Automatic Fader Circuit


Posted on Mar 30, 2013

In this circuit, audio fed to the control channel is amplified and rectified by Dl and D2. This dc level activates LED D3 via Q2. The light from D3 causes R9, a light-dependent resistor to decrease resistance. As Rll (audio gain) is set higher, more audio is present at the output of Ql. Audio fed into J2 is shunted to ground via R9 and less of this audio appears at J3.


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

Therefore, audio at Jl controls the audio level fed to J3 from J2 andjproduces a fade effect.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Door lock Circuit
Frequency meter 1KHz to 1MHz
8W-fworescent-lamp-inverter
20Khz-arc-welding-inverter
5800 Xpressmusic LCD Screen Display Problem Repair Procedure
The UC3825BN as DC/DC Converter Central Processor Circuit Schematic and Datasheet
Pick
ir remote control extender mark 5
Canary chirp generator
AT89C51-12PI AT89C51 80C31 Microcontroller With 4K Bytes Flash Use AT89S51
STEORN DEMO LIVE & STREAM
cascading shift registers to drive 7-segment displays with PC input
TRANSISTORIZED THYRATRON RING COUNTER
A novel control circuit Lantern



Top