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Need an adjustable dc power supply for your workbench this article complete with circuit schematic diagram and plans shows you how how well will it work a power supply can be considered truly complete only if it has facilities for a continuously variable voltage short current and over load protection and the output is perfectly regulated and stabilized. A very lab adjustable power supply that can provide an output voltage between 0 and 60 volts can be designed using this circuit diagram this lab power supply can be designed with lm723 chip or for higher output voltages with l146output current is also adjustable but once established is always effective. Adjustable power supply circuit schematic the wiring diagram on the opposite hand is particularly beneficial to an outside electrician sometimes wiring diagram may also refer to the architectural wiring program the simplest approach to read a home wiring diagram is to begin at the source or the major power supply. This dc power supply circuit diagram is designed as an additional or as a permanent power supply for all general circuits based on a stable dc voltage between 3 and 30v provided that current consumption does not exceed 3a of course this dc power supply can also be used to other purposes. Variable power supply with digital control a variable power supply circuit is built with variable positive voltage regulator lm317 cmos decade counter ic cd4017 timer ic ne555 and fixed negative voltage regulator lm7912 the ac supply is fed to the transformer which is stepped down to 12v ac