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. The main principle, we use this project to reduce the voltage from AC-line 220V to 12V DC.(12 volt filtered power supply)
On Figure 1 The AC 220V 50HZ is connected to the circuit through S1- ON-OFF switch and F1-fuse to protect this circuit. Then they flow through a 2A transformer to reduce voltage into 12V AC. Next, through both Diodes to rectifier AC to DC converter. Then, at a capacitor as the filter to DC voltage. The LED1 is power on display and R1 limit current for LED use.
Figure 1 the simple 12V 2A Power supply circuit diagram
Parts you will needs
T1____12V CT 12V, 2A transformer
D1,D2____1N5402, 3A Diode
C1_______2,200uF 25V Electrolytic capacitor
R1_______1.2K 0.5W Resistors
LED1_____LEDs as you like
Copper wires and nail 0.5inch, AC line power
How to make 12V dc power supply
This projects, my son build 12 volt filtered power supply with himself many steps. Begin of all, put the paper on a sheet of plywood and Hammer a nail into the parts joint.(Figure 2) He soldered all parts on nail head instead of the PCB.(Figure 3). All parts of AC line is high voltage I connect them instead of my son.
Then, he try to apply the DC pump as load. As video below.
This project of homeschooling boy is fist Electronic times we have happy it works great.
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