Automatic Voltage Stabilizer Circuit (4 Relay)

It is a microcontroller (Atmega8A) & relay based Automatic Voltage Stabilizer Circuit. Circuit Input Voltage range: 110V – 280V AC and Output voltage range: 220V ± 5%. By ensuring fast switching by microcontroller it eliminates almost all high surge voltage during start up. Smooth relay switching by zero-crossing technology it extends relay’s working life. With this circuit can manufacturing upto 2 KVA stabilizer easily.

These Circuit having the following features –

Features:
Start-up delay count with 7 segment common cathode display.
Input and Output Voltage 7 segment Display.
Low and high voltage cut-out is inbuilt.
Zero-crossing relay switching.
Delay time 10 sec / 180 sec.
Trouble free.
No Relay Chattering.
Easy to set with single preset only.
Production can be very fast.