Introduction
How many times do you turn on and off your subwoofer amplifier or normal amplifiers? Is it possible to make it automatically?
Yes the Automatic amplifier power on and off circuit will do the task for you. You are busy with work.
The music is stopped but the amplifier is still working. You need to reach near the amplifier to turn it off. But this automatic amplifier circuit will turn on and off the amp as per the audio signal presence. Sounds good ?
Why Automatic Power ON/OFF switch Circuit is Essential in Amplifier
The circuit will turn on and off your amplifier automatically when an audio signal is getting and also leaving from this circuit. For example you turn on the TV ( it needs some time to turn on ) if you play music in that time only the Amplifier will turn on the Tv audio signal get lost the amplifier will go to power off mode.
This is an efficient amplifier power saving circuit. You can apply this circuit to your power audio amplifiers. The circuit will works with minimal components and high accurately operating the on off process.
Automatic Power on off Switch Circuit
The circuit is working with LM358 Op amp IC. The circuit needs 12v to start operating. The 12 v dc can be connected using a separate 12v transformer and rectifier circuit.
The 12v DC power supply and relay contact connection circuit is given below. You can use this circuit to control the amplifier switch automatically.
Power Supply Circuit for Automatic Amplifier On Off Swich
