30V Regulated Power Supply Circuit
This is a simple 30V regulated power supply, but low-ripple power supply, and an excellent project if you're starting out in electronics. It will suit your needs for most of your bench testing and prototype applications.
The output of power supply is adjustable from 1.2 volts to about 30 volts. Maximum current is about 1.5 amps, which are also sufficient for most of your tinkering. It is relatively easy to build and can be pretty cheap if you have some or
Friday, July 29, 2011
Thursday, July 28, 2011
Programmable Power Supply
Programmable Power Supply Circuit
In laboratory and experimental work, the source of electric energy is very important for the project. Most electronic products require power to function so power supplies are an integral part of any instrumentation system. Sometimes it is difficult to use a power supply when it comes to getting an accurate output value and often the more features on the power supply the more difficult it is to operate. When a power supply has all these different features, they
In laboratory and experimental work, the source of electric energy is very important for the project. Most electronic products require power to function so power supplies are an integral part of any instrumentation system. Sometimes it is difficult to use a power supply when it comes to getting an accurate output value and often the more features on the power supply the more difficult it is to operate. When a power supply has all these different features, they
DC to DC Converter Circuit
12V to 120V DC to DC Converter Circuit
Here is a step up DC to DC Converter circuit. The design is a simple saturation-limited push-pull converter. There is no special reason to use PNP transistors. I used them simply because I had a box full of them around. You may well turn over the design to use NPN transistors.
The 2SC945 is a bias switch for DC to DC Converter circuit to start up. When applying 12V power, this transistor applies enough bias to the power transistors to get the
Here is a step up DC to DC Converter circuit. The design is a simple saturation-limited push-pull converter. There is no special reason to use PNP transistors. I used them simply because I had a box full of them around. You may well turn over the design to use NPN transistors.
The 2SC945 is a bias switch for DC to DC Converter circuit to start up. When applying 12V power, this transistor applies enough bias to the power transistors to get the
Voltage Indicator
Automotive LED Voltage Indicator Circuit
The circuit is a voltage indicator for automotive. Connecting this circuit to the battery of your vehicle, you will always know at a glance the approximate voltage available. An indication of battery voltage is useful to the motorist for monitoring the battery's capacity to deliver current, and as a check on the efficiency of the dynamo or alternator.
Threshold voltages of the LEDs are set by two Zener Diodes (D6 & D10) plus two further diodes
The circuit is a voltage indicator for automotive. Connecting this circuit to the battery of your vehicle, you will always know at a glance the approximate voltage available. An indication of battery voltage is useful to the motorist for monitoring the battery's capacity to deliver current, and as a check on the efficiency of the dynamo or alternator.
Threshold voltages of the LEDs are set by two Zener Diodes (D6 & D10) plus two further diodes
USB Powered Battery Charger
Li-Ion USB Powered Battery Charger Circuit
One of the most extensive and convenient ways to connect electronic devices to the computer is a Universal Serial Bus (USB). However, the use of a separate power supply is still a lot of battery-powered units encountered for charging batteries. With a maximum power rating 5.25V/500 mA, USB bus power is a great source to build a USB powered battery charger for a single-cell Lithium-Ion battery.
The circuit below shows how to build a USB powered
One of the most extensive and convenient ways to connect electronic devices to the computer is a Universal Serial Bus (USB). However, the use of a separate power supply is still a lot of battery-powered units encountered for charging batteries. With a maximum power rating 5.25V/500 mA, USB bus power is a great source to build a USB powered battery charger for a single-cell Lithium-Ion battery.
The circuit below shows how to build a USB powered
Priority Switch
Appliance Priority Switch Circuit
Here is an appliance priority switch circuit were in Italy, the amount of mains power for most households is limited to three kW. With a hairdryer taking as much power as 1900W, I must check not to exceed the maximum power rating every time I switch on an electric appliance. Failing to do it may result in an unplanned walk out of the home, to restore the mains circuit breaker switch.
Appliance Priority Switch Circuit Diagram
[caption id="attachment_584"
Here is an appliance priority switch circuit were in Italy, the amount of mains power for most households is limited to three kW. With a hairdryer taking as much power as 1900W, I must check not to exceed the maximum power rating every time I switch on an electric appliance. Failing to do it may result in an unplanned walk out of the home, to restore the mains circuit breaker switch.
Appliance Priority Switch Circuit Diagram
[caption id="attachment_584"
Sealed Lead Acid Battery Charger
Sealed Lead Acid Battery Charger Circuit
Here's sealed lead acid battery charger circuit is for 12V Sealed Lead Acid (SLA) battery. It is actually a half-wave rectifier. It only charges the battery on every half cycle. The plug pack doesn't like this as it leaves residual flux in the core of the transformer and causes it to overheat.
Sealed Lead Acid Battery Charger Circuit Diagram
For Sealed Lead Acid battery charger status, there are a number of points we need to cover about the care and
Sealed Lead Acid Battery Charger
Here's sealed lead acid battery charger circuit is for 12V Sealed Lead Acid (SLA) battery. It is actually a half-wave rectifier. It only charges the battery on every half cycle. The plug pack doesn't like this as it leaves residual flux in the core of the transformer and causes it to overheat.
Sealed Lead Acid Battery Charger Circuit Diagram
For Sealed Lead Acid battery charger status, there are a number of points we need to cover about the care and
Sealed Lead Acid Battery Charger
Wednesday, July 27, 2011
Bench Power Supply
Bench Power Supply Circuit
Every electronics engineer is familiar with the anxiety of the moment when power is first applied to a newly-built circuit, wondering whether hours of work are about to be destroyed in a puff of smoke. A high-quality bench power supply with an adjustable current limit function is an excellent aid to steadying the nerves.
Unfortunately, bench power supply with good regulation performance is expensive and homebrew construction is not always straightforward. Many of
Every electronics engineer is familiar with the anxiety of the moment when power is first applied to a newly-built circuit, wondering whether hours of work are about to be destroyed in a puff of smoke. A high-quality bench power supply with an adjustable current limit function is an excellent aid to steadying the nerves.
Unfortunately, bench power supply with good regulation performance is expensive and homebrew construction is not always straightforward. Many of
Solar Power Controller
Solar Power Controller Circuit
This solar power controller circuit allows solar cell arrays to be connected to either conventional lead-acid, sealed Lead-acid, or lithium storage batteries without fear of overcharging. It allows two different electrical loads to be driven from the batteries at two different charge states to maximise power usage efficiency.
The existing solar power control circuit in this fridge aims to avoid discharging a car battery by ensuring that it only run down to a
This solar power controller circuit allows solar cell arrays to be connected to either conventional lead-acid, sealed Lead-acid, or lithium storage batteries without fear of overcharging. It allows two different electrical loads to be driven from the batteries at two different charge states to maximise power usage efficiency.
The existing solar power control circuit in this fridge aims to avoid discharging a car battery by ensuring that it only run down to a
Negative Power Supply
Negative Power Supply Circuit Module
This negative power supply circuit module is a compact, easy to build. It uses adjustable negative power supply module. This power supply module is ideal for powering any application requiring a DC supply at current levels up to 1.5A.
Negative Power Supply Circuit Description
Diodes D1-4 form a bridge rectifier which converts the AC input voltage into a DC level. They also allow a DC input voltage to be connected either way around. Capacitor C1 smooths
This negative power supply circuit module is a compact, easy to build. It uses adjustable negative power supply module. This power supply module is ideal for powering any application requiring a DC supply at current levels up to 1.5A.
Negative Power Supply Circuit Description
Diodes D1-4 form a bridge rectifier which converts the AC input voltage into a DC level. They also allow a DC input voltage to be connected either way around. Capacitor C1 smooths
Battery Charge Indicator
Equal Battery Charge Indicator Circuit
The battery charge indicator circuit below illuminates an LED to indicate unequal charges between two 12 volt lead acid batteries. It can be used to verify that two batteries are connected in parallel or isolated since the LED will be off when the voltages are equal within a tolerance, or on if the voltage difference is greater than 100 millivolts.
Battery Charge Indicator Circuit Schematic
[caption id="attachment_545" align="aligncenter" width="300"
The battery charge indicator circuit below illuminates an LED to indicate unequal charges between two 12 volt lead acid batteries. It can be used to verify that two batteries are connected in parallel or isolated since the LED will be off when the voltages are equal within a tolerance, or on if the voltage difference is greater than 100 millivolts.
Battery Charge Indicator Circuit Schematic
[caption id="attachment_545" align="aligncenter" width="300"
Switching Regulator
LM2575 Switching Regulator Circuit
This switching regulator used LM2575-5.0. You can make the stable voltage by using the three terminal regulator like LM317. However, because the output current and the inputted electric current are the same approximately, the difference between the input electric power (The input voltage x The input electric current) and the output power(The output voltage x The output current) is consumed as the heat with the regulator. Because it is, the efficiency isn’t
This switching regulator used LM2575-5.0. You can make the stable voltage by using the three terminal regulator like LM317. However, because the output current and the inputted electric current are the same approximately, the difference between the input electric power (The input voltage x The input electric current) and the output power(The output voltage x The output current) is consumed as the heat with the regulator. Because it is, the efficiency isn’t
DC Adapter
Car DC to DC Adapter Circuit using Zener
Here is a 12V DC adapter circuit that is useful to lower the voltage (DC down converter) from your car battery. This circuit is quite simple and already for constructed for a beginner because it uses fewer components are commonly known.
DC to DC adapter it will lower the car battery voltage to three alternative voltage, ie 4.5V, 6V, and 9V for loads up to 5A (with heatsink) using a voltage amplifier transistor 2N3055.
The output voltage of 12V DC
Here is a 12V DC adapter circuit that is useful to lower the voltage (DC down converter) from your car battery. This circuit is quite simple and already for constructed for a beginner because it uses fewer components are commonly known.
DC to DC adapter it will lower the car battery voltage to three alternative voltage, ie 4.5V, 6V, and 9V for loads up to 5A (with heatsink) using a voltage amplifier transistor 2N3055.
The output voltage of 12V DC
Appliance Status Monitor
Appliance Status Monitor Circuit using LED
Here's appliance status monitor circuit that serves to monitor the level of power usage that is reflected in the parameters of current and AC working voltage of the equipment used.
This simple circuit will light a LED when the connected circuit draws more than 3 A ac. At 220 volts, this means something more than 600W. Replace the LED with an opto-coupler and connect it to the PC serial or parallel port to monitor when an appliance or an industrial
Here's appliance status monitor circuit that serves to monitor the level of power usage that is reflected in the parameters of current and AC working voltage of the equipment used.
This simple circuit will light a LED when the connected circuit draws more than 3 A ac. At 220 volts, this means something more than 600W. Replace the LED with an opto-coupler and connect it to the PC serial or parallel port to monitor when an appliance or an industrial
Breakdown Voltage Tester
Breakdown Voltage Tester Circuit for High Voltage
Many components used in the projects of the home of Amateur Radio is used or may have been in storage for one year before buying. It is important to have a method to test these components before installing the equipment. This is especially true for components used in high-voltage circuits, where the risk of catastrophic failure of a component is the highest. This is one of the usability of a breakdown voltage tester.
Here is the breakdown
Many components used in the projects of the home of Amateur Radio is used or may have been in storage for one year before buying. It is important to have a method to test these components before installing the equipment. This is especially true for components used in high-voltage circuits, where the risk of catastrophic failure of a component is the highest. This is one of the usability of a breakdown voltage tester.
Here is the breakdown
Lead Acid Battery Charger
12V Lead Acid Battery Charger Circuit
The Lead acid battery charger circuit below is very simple to build requiring only a handful of cheap parts and an extra winding on your power tranny (or a separate tranny). Since the charger described is not active during sound reproduction, I have made no criteria on parts quality, so el-cheap was the way to go.
There are many battery charger circuits available for charging batteries, but many are for NiCd or NiMH batteries. They will not work for
Lead Acid Battery Charger
The Lead acid battery charger circuit below is very simple to build requiring only a handful of cheap parts and an extra winding on your power tranny (or a separate tranny). Since the charger described is not active during sound reproduction, I have made no criteria on parts quality, so el-cheap was the way to go.
There are many battery charger circuits available for charging batteries, but many are for NiCd or NiMH batteries. They will not work for
Lead Acid Battery Charger
Tuesday, July 26, 2011
PC Power Supply
How to Convert a PC Power Supply
If you find building your own desktop or PC power supply from a recycled PSU and a few parts from the local electronics store appealing, then grab some tools, pour yourself a cup of coffee (or personal preference) and let's get started. The LED (light-emitting diode emitting diode) was also salvaged from an old PC.
The Steps to The PC Power Supply Conversion
[caption id="attachment_502" align="aligncenter" width="200" caption="Compressed PC Power
If you find building your own desktop or PC power supply from a recycled PSU and a few parts from the local electronics store appealing, then grab some tools, pour yourself a cup of coffee (or personal preference) and let's get started. The LED (light-emitting diode emitting diode) was also salvaged from an old PC.
The Steps to The PC Power Supply Conversion
[caption id="attachment_502" align="aligncenter" width="200" caption="Compressed PC Power
12V Switching Power Supply
12V Switching Power Supply Circuit
The 12V switching power supply circuit provides 10 amps current maximum, using a discrete transistor regulator with an op-amp functioning as a comparator in the feedback circuit. The supply is variable frequency, in contrast to the pulse-width modulator (PWM) controllers used today.
Concerning the 12V switching power supply schematic, the front-panel power-on light is not shown. There is no adjustable current limiter in this unit, although R1, R2, R3, Q2,
The 12V switching power supply circuit provides 10 amps current maximum, using a discrete transistor regulator with an op-amp functioning as a comparator in the feedback circuit. The supply is variable frequency, in contrast to the pulse-width modulator (PWM) controllers used today.
Concerning the 12V switching power supply schematic, the front-panel power-on light is not shown. There is no adjustable current limiter in this unit, although R1, R2, R3, Q2,
13.8 Volt Power Supply
13.8 Volt Power Supply Circuit Diagram
Here is an easy way to make that has a stable output voltage, protected and clean for 13.8 volt power supply. By using the TO220 Darlington BDX-33, overall dimensions can be kept relatively small.
Using 3 BDX-33 Darlington transistors for the 13.8 volt power supply are almost three times the amount of amps than the power supply delivers, making it real though to brake. Although you could use this design to deliver 25 amps with almost no modifications
Here is an easy way to make that has a stable output voltage, protected and clean for 13.8 volt power supply. By using the TO220 Darlington BDX-33, overall dimensions can be kept relatively small.
Using 3 BDX-33 Darlington transistors for the 13.8 volt power supply are almost three times the amount of amps than the power supply delivers, making it real though to brake. Although you could use this design to deliver 25 amps with almost no modifications
Battery Charger Schematic
Lead Acid Solar Battery Charger Schematic Diagram
This solar battery charger schematic is intended for charging sealed lead-acid batteries with a solar panel in small and portable applications. The customary diode that prevents the battery from discharging through the solar panel has been replaced by a FET-comparator combination.
The solar battery charger schematic circuit will stop charging once a pre-set voltage (temperature compensated) has been reached, and recommence charging when the
This solar battery charger schematic is intended for charging sealed lead-acid batteries with a solar panel in small and portable applications. The customary diode that prevents the battery from discharging through the solar panel has been replaced by a FET-comparator combination.
The solar battery charger schematic circuit will stop charging once a pre-set voltage (temperature compensated) has been reached, and recommence charging when the
ATX Power Supply
200W PC ATX Power Supply Circuit
This ATX power supply circuit uses chip TL494 from DTK Product. Similar circuit is used in the most power supplies with output power about 200W. It uses push-pull transistor circuit with regulation of output voltage. Line voltage of the ATX power supply goes through an input filter circuit (C1, R1, T1, C4, T5) to the bridge rectifier. When a voltage is switched from 230V to 115V, then a rectifier works like a doubler. Varistors Z1 and Z2 have over-voltage
This ATX power supply circuit uses chip TL494 from DTK Product. Similar circuit is used in the most power supplies with output power about 200W. It uses push-pull transistor circuit with regulation of output voltage. Line voltage of the ATX power supply goes through an input filter circuit (C1, R1, T1, C4, T5) to the bridge rectifier. When a voltage is switched from 230V to 115V, then a rectifier works like a doubler. Varistors Z1 and Z2 have over-voltage
Shunt Regulator
Solar Panel Shunt Regulator Circuit
A solar electric power system needs panels for generation, batteries for storage, a shunt regulator to keep the batteries within a safe operating range, and in some cases a power converter for AC output. For those who need to set up a few panels for a summer cottage, a boat, a remote mountaintop installation, or whatever, I'm herewith providing a version of the regulator circuit that I have used in a lot of such installations.
Such a solar panel shunt
A solar electric power system needs panels for generation, batteries for storage, a shunt regulator to keep the batteries within a safe operating range, and in some cases a power converter for AC output. For those who need to set up a few panels for a summer cottage, a boat, a remote mountaintop installation, or whatever, I'm herewith providing a version of the regulator circuit that I have used in a lot of such installations.
Such a solar panel shunt
13.8V Power Supply
13.8V Power Supply Circuit Diagram
Here is a 13.8V power supply circuit for heavy-duty power supply to the load 20A or 30A continuous. Power supply is mostly intended for HAM radio transmitter with a low ripple, HF-immunity, and short-circuit protection features.
At maximum load, the 13.8V power supply has a voltage level of voltage drop of 0.35V DC and the output can be set between 12.3V and + /-15V. The ability of the load on the power supply can also be set to load 20A (4x 2N3055) and
Here is a 13.8V power supply circuit for heavy-duty power supply to the load 20A or 30A continuous. Power supply is mostly intended for HAM radio transmitter with a low ripple, HF-immunity, and short-circuit protection features.
At maximum load, the 13.8V power supply has a voltage level of voltage drop of 0.35V DC and the output can be set between 12.3V and + /-15V. The ability of the load on the power supply can also be set to load 20A (4x 2N3055) and
UPS Circuit
Uninterruptible Power Supply - UPS Circuit
An Uninterruptible Power Supply (UPS) is a device that sites between a power supply and a device to prevent undesired features of the power source (outages, sags, surges, bad harmonics, etc.) from the supply from adversely affecting the performance of the device. See UPS circuit diagram.
The UPS Circuit may be split into four main circuits: Input Power Factor Correction, Battery Boost, Free-Running Chopper, and Inverter. The UPS is an online device
An Uninterruptible Power Supply (UPS) is a device that sites between a power supply and a device to prevent undesired features of the power source (outages, sags, surges, bad harmonics, etc.) from the supply from adversely affecting the performance of the device. See UPS circuit diagram.
The UPS Circuit may be split into four main circuits: Input Power Factor Correction, Battery Boost, Free-Running Chopper, and Inverter. The UPS is an online device
Adjustable DC Power Supply
Positive Adjustable DC Power Supply Module Circuit
This electronic circuit is positive adjustable DC power supply that is a compact, easy to build and use positive variable power supply module. It is ideal for powering any application requiring a DC supply at current levels up to 1.5A.
Positive Adjustable DC Power Supply Circuit
Diodes D1-4 form a bridge rectifier which converts the AC input voltage into a DC level. They also allow a DC input voltage to be connected either way around.
This electronic circuit is positive adjustable DC power supply that is a compact, easy to build and use positive variable power supply module. It is ideal for powering any application requiring a DC supply at current levels up to 1.5A.
Positive Adjustable DC Power Supply Circuit
Diodes D1-4 form a bridge rectifier which converts the AC input voltage into a DC level. They also allow a DC input voltage to be connected either way around.
Switching DC DC Converter
12V Switching DC DC Converter Circuit
This switching DC DC converter circuit designed to accept a range of input voltages that are present in a car's electrical system, and provide a stable regulated voltage output of 12v. Nominally, the battery voltage is about 13.8v, but when the car engine is being started, the voltage can often droop down to 6 or 7 volts for a short time, and peaks can be present somewhat above the nominal voltage as well.
This switching DC DC converter project is now
This switching DC DC converter circuit designed to accept a range of input voltages that are present in a car's electrical system, and provide a stable regulated voltage output of 12v. Nominally, the battery voltage is about 13.8v, but when the car engine is being started, the voltage can often droop down to 6 or 7 volts for a short time, and peaks can be present somewhat above the nominal voltage as well.
This switching DC DC converter project is now
1000 Watt Power Inverter
1000 Watt Power Inverter Circuit Diagram
This 1000 watt power inverter circuit will provide a very stable "Square Wave" Output Voltage. Frequency of operation is determined by a pot and is normally set to 60 Hz. Various "off the shelf" transformers can be used. Alternatively, custom wind your own for best results.
Additional MOSFETs can be paralleled for higher power. It is recommended to have a Fuse in the Power Line and to always have a "Load connected," while power is being applied. The
This 1000 watt power inverter circuit will provide a very stable "Square Wave" Output Voltage. Frequency of operation is determined by a pot and is normally set to 60 Hz. Various "off the shelf" transformers can be used. Alternatively, custom wind your own for best results.
Additional MOSFETs can be paralleled for higher power. It is recommended to have a Fuse in the Power Line and to always have a "Load connected," while power is being applied. The
DC DC Converter Circuit
Variable Voltage Input DC DC Converter Circuit
A DC DC converter circuit or another name known as a buck regulator or switching regulator (because the input voltage can be either above or below the desired voltage output), provides a stable regulated output voltage to supply electronic circuits.
LM2576 DC DC converter circuit performed the same functions as the commonly known voltage regulator LM7805 from National Semiconductor. The 7805 voltage regulator dissipates a lot heat. The higher
A DC DC converter circuit or another name known as a buck regulator or switching regulator (because the input voltage can be either above or below the desired voltage output), provides a stable regulated output voltage to supply electronic circuits.
LM2576 DC DC converter circuit performed the same functions as the commonly known voltage regulator LM7805 from National Semiconductor. The 7805 voltage regulator dissipates a lot heat. The higher
Boost Regulator
Bug Boost Regulator Circuit
This boost regulator is for those times when you have a 28v relay, but want to use it with a 12v source. The circuit is built around the National Semiconductor LM2585, and uses the energy stored in an inductor to boost the 12 to 28v. Output voltage can be varied by adjusting the ratio of resistor values on the feedback pin.
The voltage boost regulator circuit does it's switching around 100 KHz, but generates no noise if SMT components are used. Output is good for
This boost regulator is for those times when you have a 28v relay, but want to use it with a 12v source. The circuit is built around the National Semiconductor LM2585, and uses the energy stored in an inductor to boost the 12 to 28v. Output voltage can be varied by adjusting the ratio of resistor values on the feedback pin.
The voltage boost regulator circuit does it's switching around 100 KHz, but generates no noise if SMT components are used. Output is good for
12V Battery Charger
Car 12V Battery Charger Circuit
Most car battery chargers are simple devices that continuously charge the battery with a few amperes for the duration it is ON. If the charger is not switched OFF in time, they will overcharge, its electrolyte lost due to evaporation, and its plate-element will likely be destroyed. However, unlike with a 12V battery charger circuit follows.
The 12V battery charger circuit below will eliminate these problems by monitoring the battery's condition of charge
Most car battery chargers are simple devices that continuously charge the battery with a few amperes for the duration it is ON. If the charger is not switched OFF in time, they will overcharge, its electrolyte lost due to evaporation, and its plate-element will likely be destroyed. However, unlike with a 12V battery charger circuit follows.
The 12V battery charger circuit below will eliminate these problems by monitoring the battery's condition of charge
AC Power Supply
High Voltage AC Power Supply Circuit
These transformers are AC power supply with 120VAC input and 2kVAC output. Just wire the cores together (the cores are normally one of the High Voltage Terminals) and wire the primaries, so they oppose each other. If you don't get a nice arc from this switch the input leads on one transformer.
This will not arc over that far, but if you start a small arc you can pull it out to about 5'. These transformers will make an excellent AC power supply for a
These transformers are AC power supply with 120VAC input and 2kVAC output. Just wire the cores together (the cores are normally one of the High Voltage Terminals) and wire the primaries, so they oppose each other. If you don't get a nice arc from this switch the input leads on one transformer.
This will not arc over that far, but if you start a small arc you can pull it out to about 5'. These transformers will make an excellent AC power supply for a
Sunday, July 24, 2011
7805 Datasheet
7805 Datasheet PDF Download
7805 Datasheet is a technical data of the 7805 voltage regulator IC-related characteristics that accompanied the basic theory in the design of these products. In the datasheet usually attached to the use of design examples in a variety of applications. This helps the designer in the design of electronic power supply applications.
Here you can download 7805 datasheet from various manufacturing companies. This list is compiled in this article to facilitate you
7805 Datasheet is a technical data of the 7805 voltage regulator IC-related characteristics that accompanied the basic theory in the design of these products. In the datasheet usually attached to the use of design examples in a variety of applications. This helps the designer in the design of electronic power supply applications.
Here you can download 7805 datasheet from various manufacturing companies. This list is compiled in this article to facilitate you
LM317 Datasheet
LM317 Datasheet PDF Download
LM317 Datasheet is a technical data of the LM317 voltage regulator IC-related characteristics that accompanied the basic theory in the design of these products. In the datasheet usually attached to the use of design examples in a variety of applications. This helps the designer in the design of electronic power supply applications.
Here you can download LM317 datasheet from various manufacturing companies. This list is compiled in this article to facilitate you
LM317 Datasheet is a technical data of the LM317 voltage regulator IC-related characteristics that accompanied the basic theory in the design of these products. In the datasheet usually attached to the use of design examples in a variety of applications. This helps the designer in the design of electronic power supply applications.
Here you can download LM317 datasheet from various manufacturing companies. This list is compiled in this article to facilitate you
Voltage Drop Calculator
DC Voltage Drop Calculator
Voltage drop can be interpreted as a reduction of voltage on the passive component, not the source, of an electronic or electrical circuit. Voltage drop between the contacts, connections, conductors, and resistance to internal resources that are not desirable because they reduce the applied voltage, while the voltage on the load and the electrical and electronic components of other, useful and desirable. For that we need a tool known as a voltage drop
Voltage drop can be interpreted as a reduction of voltage on the passive component, not the source, of an electronic or electrical circuit. Voltage drop between the contacts, connections, conductors, and resistance to internal resources that are not desirable because they reduce the applied voltage, while the voltage on the load and the electrical and electronic components of other, useful and desirable. For that we need a tool known as a voltage drop
LM317T
LM317/LM317T Datasheet
LM317/LM317T IC is a voltage regulator that is widely used in power supply circuits. It is a 3-terminal integrated circuit that can work well with 3V-40V output voltage with the ability to serve the load current up to 1.5A. IC of this type is easily obtained with a cheap price.
LM317T example in the use of, among others, provide a maximum voltage or current remain in the application of LED lighting or solar battery charger, which takes advantage both these parameters
LM317/LM317T IC is a voltage regulator that is widely used in power supply circuits. It is a 3-terminal integrated circuit that can work well with 3V-40V output voltage with the ability to serve the load current up to 1.5A. IC of this type is easily obtained with a cheap price.
LM317T example in the use of, among others, provide a maximum voltage or current remain in the application of LED lighting or solar battery charger, which takes advantage both these parameters
LM7805
LM7805 Datasheet
LM7805 is a voltage regulator ICs with output +5 volts. Code 78 gives the information that the output voltage plus (+), 05 is the value of output voltage. And vice versa if the code number 79, ie the output voltage is Minus (-). So generally the type of IC voltage regulator is given the symbol 78XX/79XX, with output voltage options of 5, 6, 8, 9, 10, 12, 15, 18, 24.
What is a LM7805 Voltage Regulator
IC 7805 included in 78XX series of three terminal positive regulators
LM7805 is a voltage regulator ICs with output +5 volts. Code 78 gives the information that the output voltage plus (+), 05 is the value of output voltage. And vice versa if the code number 79, ie the output voltage is Minus (-). So generally the type of IC voltage regulator is given the symbol 78XX/79XX, with output voltage options of 5, 6, 8, 9, 10, 12, 15, 18, 24.
What is a LM7805 Voltage Regulator
IC 7805 included in 78XX series of three terminal positive regulators
Voltage Divider
What is Resistive Voltage Divider Circuit?
If you often wrestle with practical electronics activities, of course you know about the voltage reference. Reference voltage is a voltage which is usually derived from stable sources. An easy way to produce a voltage that is typically used to form a resistive voltage divider.
A voltage divider is a simple linear circuit to produce output voltage (Vout) which is a division of the input voltage (Vin). The divider also known as a potential divider,
If you often wrestle with practical electronics activities, of course you know about the voltage reference. Reference voltage is a voltage which is usually derived from stable sources. An easy way to produce a voltage that is typically used to form a resistive voltage divider.
A voltage divider is a simple linear circuit to produce output voltage (Vout) which is a division of the input voltage (Vin). The divider also known as a potential divider,
Adjustable Voltage Regulator
LM338 5A Adjustable Voltage Regulator Circuit
Here's an adjustable voltage regulator circuit using LM138 Series. The LM138 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 5A over a 1.2V to 32V output range. They are exceptionally easy to use and require only 2 resistors to set the output voltage. Careful circuit design has resulted in outstanding load and line regulation—comparable to many commercial power supplies.
Adjustable Voltage
Here's an adjustable voltage regulator circuit using LM138 Series. The LM138 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 5A over a 1.2V to 32V output range. They are exceptionally easy to use and require only 2 resistors to set the output voltage. Careful circuit design has resulted in outstanding load and line regulation—comparable to many commercial power supplies.
Adjustable Voltage
Regulated Power Supply Circuit
Regulated Power Supply Circuit Diagram
Here is a regulated power supply circuit using a zener diode with an output of 24V. Configuring the system power supply is easy, suppose you want max voltage regulatable 3A 15 Volt maximum, then you only need to change the Zener Diode (ZD) and a transformer for one of 15 volts.
Power supply can be divided into two parts, namely the unregulated power supply circuit and regulated power supply circuit. The Circuit before serial components r1 and c4 is the
Here is a regulated power supply circuit using a zener diode with an output of 24V. Configuring the system power supply is easy, suppose you want max voltage regulatable 3A 15 Volt maximum, then you only need to change the Zener Diode (ZD) and a transformer for one of 15 volts.
Power supply can be divided into two parts, namely the unregulated power supply circuit and regulated power supply circuit. The Circuit before serial components r1 and c4 is the
Salt Water Battery
Salt Water Battery Circuit Project
This power supply circuit is a salt water battery to operate a single AA battery quartz clock. It ran for several months until I got tired of adding water to compensate for evaporation. The battery consisted of five cells each producing about 300 millivolts.
As I remember, I used 5 small olive jars filled with about a cup of water and a tablespoon of salt to create five cells in series each producing about 300 millivolts for a total of around 1.5 volts.
This power supply circuit is a salt water battery to operate a single AA battery quartz clock. It ran for several months until I got tired of adding water to compensate for evaporation. The battery consisted of five cells each producing about 300 millivolts.
As I remember, I used 5 small olive jars filled with about a cup of water and a tablespoon of salt to create five cells in series each producing about 300 millivolts for a total of around 1.5 volts.
Laptop Power Supply
95W Laptop Power Supply Adapter Circuit
Here is a laptop power supply adapter is a special circuit is used on cars. Power supply is staying connected to the car cigarette lighter socket and able to serve the load up to 95 Watts. Power adapter is also equipped with a printed circuit board (PCB) is quite small.
The laptop power supply adapter described here produces a 19V nominal output voltage adjustable by +/ - 0.5V. The input voltage range is from 9.2V to 15V and the output voltage shows
Here is a laptop power supply adapter is a special circuit is used on cars. Power supply is staying connected to the car cigarette lighter socket and able to serve the load up to 95 Watts. Power adapter is also equipped with a printed circuit board (PCB) is quite small.
The laptop power supply adapter described here produces a 19V nominal output voltage adjustable by +/ - 0.5V. The input voltage range is from 9.2V to 15V and the output voltage shows
DC DC Converter
DC DC Converter Circuit Diagram
Electronic system is designed to operate from a supply voltage, which is usually assumed to be constant. A voltage regulator provides this constant DC output voltage and contains circuitry that continuously holds the output voltage at the design value regardless of changes in load current or input voltage, assuming that the load current and input voltage are within the specified operating range for that regulator. In portable systems, the input voltage is often
Electronic system is designed to operate from a supply voltage, which is usually assumed to be constant. A voltage regulator provides this constant DC output voltage and contains circuitry that continuously holds the output voltage at the design value regardless of changes in load current or input voltage, assuming that the load current and input voltage are within the specified operating range for that regulator. In portable systems, the input voltage is often
Universal Laptop Power Supply
70W Universal Laptop Power Supply Adapter Circuit
Here is an external laptop adapter circuit which is an AC / DC universal power supply adapter. It is equipped with features with approximately constant overload power line voltage, ie line undervoltage detection (UV) and overvoltage (OV) shutdown, and is fully protected for overload, short circuit and thermal errors.
In addition to the above features, universal laptop power supply consumes low electricity load, which is about 370mW at 115V
Here is an external laptop adapter circuit which is an AC / DC universal power supply adapter. It is equipped with features with approximately constant overload power line voltage, ie line undervoltage detection (UV) and overvoltage (OV) shutdown, and is fully protected for overload, short circuit and thermal errors.
In addition to the above features, universal laptop power supply consumes low electricity load, which is about 370mW at 115V
Saturday, July 23, 2011
Switching Power Supply
Switching Power Supply Circuit
This power-supply project describes the construction of a switching power supply designed to power a complete ham station, with several radios and accessories. This power supply produces 13.8V regulated to better than 1%, at a continuous load current of up to 40A.
This switching power supply schematic circuit has current limiting, making it appropriate for direct connection to a 12V backup battery. If the current limit potentiometer is turned up, the power
This power-supply project describes the construction of a switching power supply designed to power a complete ham station, with several radios and accessories. This power supply produces 13.8V regulated to better than 1%, at a continuous load current of up to 40A.
This switching power supply schematic circuit has current limiting, making it appropriate for direct connection to a 12V backup battery. If the current limit potentiometer is turned up, the power
Thursday, July 21, 2011
High Voltage Power Supply
High Voltage power Supply Circuit with Low Current
The following circuit is a high voltage power supply by using transistor DC to DC converter. It is a very useful source which can be effectively used in many applications like biasing of gas-discharge tubes and radiation detectors, etc. Such a power supply could also be used for protection of property by electric charging of fences.
High Voltage power Supply Circuit Diagram
The current requirement of power supply is of the order of a few
The following circuit is a high voltage power supply by using transistor DC to DC converter. It is a very useful source which can be effectively used in many applications like biasing of gas-discharge tubes and radiation detectors, etc. Such a power supply could also be used for protection of property by electric charging of fences.
High Voltage power Supply Circuit Diagram
The current requirement of power supply is of the order of a few
Regulated Power Supply
Zener Regulated Power Supply Circuit
This circuit is regulated power supply with voltage and current regulatable, with maximum current 4 ampere for voltage range 0-18 Volt. Final power is composed by two of 2N3055 and BDX33 drive transistor. Output voltage regulated by zener circuit with serial potentiometers.
The output voltage of the regulated power supply can be set from 0-18V and can serve loads up to 4A. If you want increased power becomes larger, it is necessary to change the capacity
This circuit is regulated power supply with voltage and current regulatable, with maximum current 4 ampere for voltage range 0-18 Volt. Final power is composed by two of 2N3055 and BDX33 drive transistor. Output voltage regulated by zener circuit with serial potentiometers.
The output voltage of the regulated power supply can be set from 0-18V and can serve loads up to 4A. If you want increased power becomes larger, it is necessary to change the capacity
Resistor Calculator
LED Resistor Calculator Circuit
This resistor calculator requires the use of Javascript enabled and capable browsers. A question that often comes up in projects using LEDs is "what resistor should I use with my LED?" This calculator helps determine that for you. Enter the data required for Supply Battery Voltage in the range of 3 to 24 volts, the Diode Forward Voltage in the range of 2 to 4 volts, and the Diode Rated Current in the range of 10 to 50 milliamps (mA).
[caption
This resistor calculator requires the use of Javascript enabled and capable browsers. A question that often comes up in projects using LEDs is "what resistor should I use with my LED?" This calculator helps determine that for you. Enter the data required for Supply Battery Voltage in the range of 3 to 24 volts, the Diode Forward Voltage in the range of 2 to 4 volts, and the Diode Rated Current in the range of 10 to 50 milliamps (mA).
[caption
Dual Power Supply
Dual Power Supply Circuit with 78xx-79xx ICs
This is a simple dual power supply using voltage regulator IC 78xx and 79xx series. It's the best and simplest choice for most non-critical applications. The 3 terminals are input, ground and output. The 78xx & 79xx IC series can provide up to 1A load current, and it had on-chip circuitry to prevent damage in the event of over heating or excessive current.
Dual Power Supply Circuit Diagram
This dual power supply project provides a dual power
This is a simple dual power supply using voltage regulator IC 78xx and 79xx series. It's the best and simplest choice for most non-critical applications. The 3 terminals are input, ground and output. The 78xx & 79xx IC series can provide up to 1A load current, and it had on-chip circuitry to prevent damage in the event of over heating or excessive current.
Dual Power Supply Circuit Diagram
This dual power supply project provides a dual power
Resistor Calculator
LED Resistor Calculator Circuit
This resistor calculator requires the use of Javascript enabled and capable browsers. A question that often comes up in projects using LEDs is "what resistor should I use with my LED?" This calculator helps determine that for you. Enter the data required for Supply Battery Voltage in the range of 3 to 24 volts, the Diode Forward Voltage in the range of 2 to 4 volts, and the Diode Rated Current in the range of 10 to 50 milliamps (mA).
[caption
This resistor calculator requires the use of Javascript enabled and capable browsers. A question that often comes up in projects using LEDs is "what resistor should I use with my LED?" This calculator helps determine that for you. Enter the data required for Supply Battery Voltage in the range of 3 to 24 volts, the Diode Forward Voltage in the range of 2 to 4 volts, and the Diode Rated Current in the range of 10 to 50 milliamps (mA).
[caption
Variable Voltage Regulator
LM317T Variable Voltage Regulator Circuit
The LM317T Voltage Regulator IC is very useful in many renewable-energy applications. LM317T can be used to regulate current to regulate the current in a string of LEDs - or it can be used to provide a stable fixed voltage output. However, as the schematic below is used as an LM317T variable voltage regulator circuit.
The LM317T is an adjustable 3 terminal positive voltage regulator capable of supplying in excess of 1.5 amps over an output range of
The LM317T Voltage Regulator IC is very useful in many renewable-energy applications. LM317T can be used to regulate current to regulate the current in a string of LEDs - or it can be used to provide a stable fixed voltage output. However, as the schematic below is used as an LM317T variable voltage regulator circuit.
The LM317T is an adjustable 3 terminal positive voltage regulator capable of supplying in excess of 1.5 amps over an output range of
High Current Power Supply Circuit
20A High Current Power Supply Circuit
The power supply circuit shown in the schematic is the high current power supply circuit. A 7812 positive 3-terminal regulator is used for the main 13.8V 10A regulator, and this is followed by as many power emitter followers as needed for the current you require. The transistors are not critical. I used 2N3771 devices (50V, 20A, 200W) simply because I had a whole bunch of them in my junk-box. These are pretty much ideal, but I suggest that you use whatever
The power supply circuit shown in the schematic is the high current power supply circuit. A 7812 positive 3-terminal regulator is used for the main 13.8V 10A regulator, and this is followed by as many power emitter followers as needed for the current you require. The transistors are not critical. I used 2N3771 devices (50V, 20A, 200W) simply because I had a whole bunch of them in my junk-box. These are pretty much ideal, but I suggest that you use whatever
Power Supply Circuit
Power Supply Circuit with Over-Voltage & Over-Current Protection
Here is a linear power supply circuit with output voltage 13.8V and can serve current loads up to 25 Amperes. Power supply features over-current protection on the 26 Amperes and over-voltage protection at 16 Volt.
As for additional features and technical specifications of the power supply circuit are as follows:
Uses fold-back current limiting.
Short circuit current is around eight Amps.
Uses 3 (or 4, which is
Here is a linear power supply circuit with output voltage 13.8V and can serve current loads up to 25 Amperes. Power supply features over-current protection on the 26 Amperes and over-voltage protection at 16 Volt.
As for additional features and technical specifications of the power supply circuit are as follows:
Uses fold-back current limiting.
Short circuit current is around eight Amps.
Uses 3 (or 4, which is
High Current Power Supply
40A High Current Power Supply Circuit
This high current power supply circuit describes a protected 13.2V 40A power supply unit which, provided the heat sinking and cooling fan are suitable, is capable of running at full power at 100% duty cycle. It features soft starting, over voltage, current limiting, short circuit protection and automatic fan control. It is a substantial project that is not for the novice constructor.
The high current power supply specifications:
Input voltage:
This high current power supply circuit describes a protected 13.2V 40A power supply unit which, provided the heat sinking and cooling fan are suitable, is capable of running at full power at 100% duty cycle. It features soft starting, over voltage, current limiting, short circuit protection and automatic fan control. It is a substantial project that is not for the novice constructor.
The high current power supply specifications:
Input voltage:
Linear Power Supply
20A Linear Power Supply Circuit
This linear power supply project for communication equipment is among the most commonly built electronic projects. Almost every technically inclined radio amateur has built at least one. However, unfortunately most designs, even those published in well respected books, are unnecessarily complicated, or have some specific drawbacks. The design presented here is a bit unusual in its arrangement, but offers some advantages over the usual designs.
High-Current
This linear power supply project for communication equipment is among the most commonly built electronic projects. Almost every technically inclined radio amateur has built at least one. However, unfortunately most designs, even those published in well respected books, are unnecessarily complicated, or have some specific drawbacks. The design presented here is a bit unusual in its arrangement, but offers some advantages over the usual designs.
High-Current
Adjustable Power Supply
30V 10A LM337 Stabilized Adjustable Power Supply Circuit
Here's an adjustable power supply that is a positive tension. However, we use a negative voltage stabilizer. The circuit is something else, but it has a big advantage. We now have the final transistor whose Collector often to the house is not to isolate the cooling plate!.
We can now as the transistor to the closet wall plates and screws without insulation vans. This makes the construction of this adjustable power supply is very
Here's an adjustable power supply that is a positive tension. However, we use a negative voltage stabilizer. The circuit is something else, but it has a big advantage. We now have the final transistor whose Collector often to the house is not to isolate the cooling plate!.
We can now as the transistor to the closet wall plates and screws without insulation vans. This makes the construction of this adjustable power supply is very
Regulated Power Supply LM317
40V Regulated Power Supply LM317 Circuit
The following regulated power supply circuit uses IC LM317T. This regulated power supply LM317 is suitable for using with MOSFET audio power amplifier 18W and Audio Preamplifier with Tone Control. This is very stable for 40V output voltage.
A very good and powerful regulated power supply LM317 section was implemented by simply adding a PNP power transistor to the excellent LM317T adjustable regulator chip. In this way, this regulated power supply
The following regulated power supply circuit uses IC LM317T. This regulated power supply LM317 is suitable for using with MOSFET audio power amplifier 18W and Audio Preamplifier with Tone Control. This is very stable for 40V output voltage.
A very good and powerful regulated power supply LM317 section was implemented by simply adding a PNP power transistor to the excellent LM317T adjustable regulator chip. In this way, this regulated power supply
12V Inverter
Simple 12V Inverter for Fluorescent Lamp
This 12V inverter is very easy to construct, reliable, and even powerful enough to light up a 15W fluorescent tube (if you're cool your transistor well). The only hard-to-find piece of this baby is the so-called yellow inverter transformer. It's a miniature high-frequency transformer that has a 25mm x 20mm x 5mm ferrite core, 30 turns of primary, 15 turns of feedback, and 250 turns of secondary all concentric, wound on plastic frame than wrapped with a
This 12V inverter is very easy to construct, reliable, and even powerful enough to light up a 15W fluorescent tube (if you're cool your transistor well). The only hard-to-find piece of this baby is the so-called yellow inverter transformer. It's a miniature high-frequency transformer that has a 25mm x 20mm x 5mm ferrite core, 30 turns of primary, 15 turns of feedback, and 250 turns of secondary all concentric, wound on plastic frame than wrapped with a
Car Battery Charger
Simple Car Battery Charger Circuit
Here is a simple car battery charger, because it only uses basic components of unregulated power supply. To monitor the current flowing during charging to use an Ampere meter.
This car battery charger circuit uses a transformer, two diodes, a capacitor and an ampere meter. To charge a car battery just connect the + and - terminals of the circuit to the corresponding terminals of the battery.
Ampere meter will indicate when the battery charger 1-3 ampere
Here is a simple car battery charger, because it only uses basic components of unregulated power supply. To monitor the current flowing during charging to use an Ampere meter.
This car battery charger circuit uses a transformer, two diodes, a capacitor and an ampere meter. To charge a car battery just connect the + and - terminals of the circuit to the corresponding terminals of the battery.
Ampere meter will indicate when the battery charger 1-3 ampere
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