3 Review(s)

This is a low current transformer less power supply for small applications. The capacitor reduces the high volt AC. D1-D4 rectifies AC to DC and second reduces ripples. The Zener diode is used to get regulated DC output.The Zener value can be changed to get other output voltages. This power supply is suitable when designing for application that requires low power and where cost and size are of great consideration as expensive and bulky transformer is eliminated in this type power supply. All the components in this circuit are sized so that the circuit can deliver 12 volt and 30mA of current at the output to the load.