This simple circuit mixes two or more channels into one channel (eg.
stereo into mono). The circuit can mix as many or as few channels as you
like and consumes very little power. The mixer is shown with two
inputs, but you can add as many as you want by just duplicating the
“sections” which are clearly visible on the schematic.
|R1, R3||2||10K Pot|
|R2, R4||2||100K 1/4 W Resistor|
|R5||1||6.8K 1/4 W Resistor|
|C1, C2, C3||3||0.1uF Capacitor|
|Q1||1||2N3819 Junction FET|
|MISC||1||Wire, Shielded (Metal) Case, Phono Or Other Plug For Output|
- As many or as few channels as are required can be added to
the mixer. Do this by just duplicating the input “sections” which are
shown on the schematic.
- A shielded case is probably needed to reduce hum and help stop oscillations.
- The circuit can be powered by a single 9 volt battery.