Audio Power Limiter


Posted on Nov 17, 2012

The gain control element is a Light Dependent Resistor (LDR). These are blessed with a few very useful features for our purposes, one of which is low distortion even at quite high signal levels. Being light activated, all we need is a LED to provide illumination when the preset power level is reached.


Audio Power Limiter
Click here to download the full size of the above Circuit.

Once this point is reached, a very small increase in amplifier output voltage (and power) will cause the LED to provide much more light, reducing the value of the LDR, and thus reducing the input voltage. The effect is to keep the level more or less const




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Two-wire Lamp Flasher
Free Power Generator Circuit
Simple continuity tester
Two-level-multiplexer
random
AM Radio Receiver Circuit Using TDA 1072AT IC
Accelerometer Circuit
MD-1142/UGC Modem Time Diversity BR Communications 6029C Time Diversity Modem
Plant-Pot Water Level Indicator Circuit



Top