Wednesday, September 28, 2011

12V Power Supply Circuit Diagram

Here is a simple 12V power supply circuit is easily constructed without the circuit board at all. Simply, by connecting the inter-connection as schematically attached using cables or wires are properly shielded hardware. A beginner can assemble a 12V power supply schematic is well in half an hour.

12V power supply circuit uses a transformer as a 0-15V 3A AC input. Unregulated DC power supply voltage through a component built diode bridge and capacitor electrolyte. To obtain a regulated DC voltage required a 12V zener diode and a 2N3055 transistor with the maximum load current capability 3A. Thus, the power supply circuit providing fixed output voltage 12V.

12V Power Supply Circuit

ATX Power Supply Pinout

ATX power supply pinout is the configuration of the connector pin ATX power supply that is used on a computer mainboard. Each pin associated with the color of the cable used to represent their respective functions. Each serves as a contact with three voltage polarity, ie positive, negative, earth, the configuration data.

In general, the ATX power supply pinout is connected to the voltage +3.3 V, +5 V,-5V, +12 V,-12V and 0V (Ground). Connected with the data is a function OK and Power Supply Power ON. Power OK is a status signal generated by the power supply to notify the computer. That the DC operating voltages are within the ranges required for proper computer operation (+5 VDC power is Ok). Power Supply On (active low). Short this pin to GND to switch power supply ON, disconnect from GND to switch OFF. And -5 VDC (this is optional on newer ATX version 2.0 supplies. It is for use with older AT class expansion cards and can be omitted on newer units).

ATX Power Supply Circuit

Friday, September 23, 2011

5V Power Supply Circuit

5V Power Supply Circuit - 7805
5V power supply circuit is needed by beginners as a hobby, or to provide voltage to a simple circuit. So he needed when needed, especially with regard to clean DC voltage or a regulated DC power supply.

The use of IC 7805 has become a common in use for the hobby, and 5V power supply circuit is very simple and easy to assemble. Only a few additional components for IC 7805 and its DC power supply, can produce a regulated 5V DC power supply.
Basic 5V Power

5V Power Supply Circuit

NiMH Charger Circuit

Microcontroller NiMH Charger Circuit
Here is a good NiMH charger circuit, in addition to the operation of the CPU controlled, it can also turn off automatically after 14 hours of full-time charging. Charging circuit is equipped with LED indicator display and RS232 connectors, if you want to be connected to an outside source. It's very easy to use.

On the CPU based NiMH charger circuit has the ease of setting in operation. Unlike conventional analog charger, POT simply controls the voltage

NiMH Charger Circuit

Tuesday, September 20, 2011

Universal Laptop Charger

Universal Laptop Charger Circuit
Universal laptop charger is roughly defined as a battery charger device that can generally be used to charge the battery on the laptop. However, of course, battery charger which followed the purchase of a new laptop is the most appropriate and good for your laptop. Because of this charger is a genuine, fully compatible with the specification of battery used.

As we know that laptop battery voltage is 19V DC, so that could be used for laptop battery charger,

Universal Laptop Charger