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,
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