This is cheap adjustable 0-30V 3A Laboratory DC Power Supply circuit. It is high efficiency regulator circuit by using IC regulator UA723 and TIP3055 as power transistor so easy to install. It is designed to protect over current load maximum 3A Technical data -Need to use transformer : 12-0-12V 4A. -Voltage output adjustable : 0-30VDC -Current maximum : 3A How does it works As Figure 1 circuit diagram. AC from transformer goes through bridge rectifier diode set which compress of 4 bridge diode changing AC to DC by having C1 as a filter before sending to regulator circuit. Parallel R …
Today, my son builds a simple 12V 2A DC power supply for a 12V solar pump. It is an Unregulated power supply because load is DC motor only. Note: More circuits 12V Power Supply How to works I teach son to understand the working principle of this projects. The main principle, we use this project to reduce voltage from AC-line 220V to 12V DC. 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 flows through a 2A transformer to reduce voltage into 12V AC. Next,through …