Variable Switching Power Supply Schematic. The schematic of my switching power supply you can see below. Lm317 voltage regulator calculator datasheet.
I tried everything but the out remain the same but apart from this other is working fine so what could be the issue here i use ic lm317. 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. 0 70 volts 2 amps dc variable look at here.
Transistor variable power supply 1a 0 30v.
0 70 volts 2 amps dc variable look at here. Cheap dc adjustable 0 30v 2a laboratory look at here. This fast rectifier restricts the negative spikes at the inductor input side to a harmless 0 6 to 1 v for every switch off periods of the ics internal output transistor. But if the reference voltage has less switching pulse value so low duty cycle as figure 3.
