Here is a simple stereo mixer for you that can be easily built. You can mix 2 stereo sources.
About the Circuit
![](https://i0.wp.com/tataylino.com/wp-content/uploads/2021/03/sch.jpg?w=840&ssl=1)
The Circuit is simple and uses only 1 opamp. This can be powered by a 12V DC or a 9V battery.
PCB Layout
PACB layout is done with KiCad
![](https://i0.wp.com/tataylino.com/wp-content/uploads/2021/03/pcbkicad.jpg?w=840&ssl=1)
![](https://i0.wp.com/tataylino.com/wp-content/uploads/2021/03/pcb.jpg?w=840&ssl=1)
3D Render
![](https://i0.wp.com/tataylino.com/wp-content/uploads/2021/03/4chMixer.jpg?w=840&ssl=1)
DOWNLOADS
You can download the PCB pattern on the download page.