Motivation
This is a 4 x 4 matrix mixer with switches for unipolar/bipolar mode for each column. Unipolar means that the controls work as attenuators. Bipolar means that the controls work as attenuverters. In this mode the amplification is zero in the middle position of the corresponding potentiometer. Turning the knob counterclockwise from the center position the signal is subtracted from the output sum. Turning the knob clockwise from the center position the signal is added to the output sum. The module is DC-coupled and can be used for audio and control voltage mixing.
Specs and features
- 4x4 Matrix
- Switchable unipolar or bipolar mode
- Power consumption below 30mA each rail
Implementation
Schematic
Matrix Mixer schematic: Control board
Matrix Mixer schematic: Main board
Description:
Tbd.
Calibration
- None
Building hints
- None
Special parts
- None
Download
Matrix Mixer control board documentation downloadMatrix Mixer control board Gerber files download
Matrix Mixer main board documentation download
Matrix Mixer main board Gerber files download
Matrix Mixer *.fpd file
Matrix Mixer: Front view
Matrix Mixer: Populated control PCB front
Matrix Mixer: Populated main PCB
Matrix Mixer: Side view
