Clip Indicator (LED) for Any Power Amp

A power amplifier cannot deliver an output wave wider than its power supply voltage. When you reach the limit, increasing gain may sound louder but sound will be distorted and can even damage speakers .This simple clipping indicator circuit will announce with an LED that you have reached that limit.

Step 1: Circuit Diagram & Main Components

Q1 BC547NPN transistor

Q2 BC557PNP transistor

D1-D3 1N4148diode

note: If your amp V+ voltage is higher than 45v use BC546/BC556(up to 65v) or other higher voltage ones.

also increase R4 for a led current of 30mA. ( R=v/a )

Step 2: Q1: Emitter Follower

Step 3: Q2: Led Driver

Step 4: C1: Peak Hold

For longer "peak hold" time increase R3 up to 100K

Step 5: D1-D3 Voltage Drop

Step 6: For More Datails, Watch Video. Thank You!