Audio Fader

Posted on Nov 27, 2012

In this circuit, Ql is a simple amplifier that has its gain controlled by a variable emitter resistance supplied by FET Q2. In

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

the up position of SI, C3 discharges through R5 and the gain of Ql decreases because Q2 is driven toward cut-off. In the down position, Q2 conducts more, depending on the setting of R6, which causes a gain increase. By varying R5 or C3, various fade rates can be obtained.

Leave Comment

characters left:

New Circuits



Popular Circuits

5 watt, 80 meter QRP CW Transceiver
Sound activated relay
Reading an SD card with an ATMEGA168
tv transmitter circuit
Single-phase torque motor speed control circuit 2
TA7366 67 five lights single drive circuit
Electric sewing machine saving circuit