Diy Power Supply Diagrams. The central ic is lm7812 which will change over the voltage starting from the transformer and gives a 12v controlled output on pin 1 of the lm7805 ic. High cur 12v 13 8v at 30a 25a 20a 12 volt 30 amp psu circuit diagram power supply laboratory source lm338 0 30v 2n3055 15 20 40a switching adjule voltage 10 ampere dc ilizers diagrams to 50v 10amp variable dual using 3v 24v wiring material october 2014 5a ic modifying a chinese 100 15a regulator switch mode simple how build 100v 50 smps.
As it can be seen most of the components used are all popular types and easily available except the inductor which needs to be constructed at home. Amz power supply. Here are 4 simple 12v power supply circuits with output voltages around 12v.
Most household electronic products like mobile chargers bluetooth speakers power banks smart watches etc requires a power supply circuit that could convert the ac mains supply to 5v dc to operate them.
First power supply circuit is built with bd139 one zener diode and a few passive components. Its a good protection diy test equipment. Each of the schematic is very simple to construct and will function without problems if you respect the maximum power supply ratings. In this project we will build a similar ac to dc power supply circuit with 10w.