Electronic Circuits and Software Related USB servo controller This device was designed to control standard hobby radio control servos via a PCs USB port.Standard RC servos need a power supply of between 4.8 and 6 Dual Power Supply A power supply that is suitable for most amps of 60W output. Can be adapted or modified to other voltages for more or less power.A power supply suitab 15V Dual Power Supply for Preamplifiers 15V dual Power Supply for Preamplifier based on 7815 and 7915 regulator.This circuit will not work with external DC power supplies.The rectifier is a Light flasher circuit This circuit will generate signal to flashing the small lamp about every 1 second.The flashing rate control by adjust R1.The rate voltage of the lamp High Effi ciency, Low Cost, Non-Isolated 350 mA, 12 V LED Driver The schematic for a universal input 12 V, 350 mA CV/CC power supply for LED driver applications using the LinkSwitch-II product LNK605DG in a tapped-i