Circuit : Andy Collinson Email : Description A 12 Volt high current 20 Amp power supply. The output voltage is variable from 12.2 Volt to 14.4V so can be set for any device requiring voltage and current in that range. This PSU uses an LM723 as the regulator, 4 parallel connected outboard pass transistors and has current limiting above 25 amps.
The switching power supply, shown in the schematic, provides 12 volts, at 10 amps, maximum, using a discrete transistor regulator with an op-amp functioning as a comparator in the feedback circuit. The supply was constructed in 1984 and is variable frequency, as opposed to the pulse width modulator (PWM) controllers used today. visit page.
Today, my son builds a simple 12 volt power supply circuit for a 12V solar pump. It is an Unregulated 2A Power supply. Because a load is DC motor only. Note: More 12 volt Power Supply circuit. How to works I teach son to understand the working principle of this projects.
DC Power Supply Schematic Diagram. Above are the parts needed to create a DC power supply. Below is the schematic for the DC power supply, so that we can see how all the parts are connected and are brought together: To build a DC power supply, purchase a 3-prong AC plug. It can also work
Constructing the Circuit. The +5 volt power supply will go on the left end of your breadboard socket. There should not be any components mounted here when you begin; the analog experiments will be mounted on a separate breadboard socket from the digital experiments, until you have constructed or obtained a comprehensive breadboarding system.
Then connect a 100 ohm, 3 Watt resistor or other small load. The reading on the voltmeter should not change. If you do not see 12 Volt, power off and check all connections. I have heard from one reader whose supply was 35 Volt, not the regulated 12 Volts. This was caused by a short circuited power transistor.