004
4-Channel Mixer

This module is a 4-channel mixer. It takes four inputs and adds them together into one output signal. This module also has passive attenuators for each channel, and for the main output, so you can adjust the strength of each signal and of the resulting sum. Additionally, this module provides a second output, inverted, since with the particular circuit used in this module, you get an inverted output for free.

The build guide is located here.

All of these modules are open source. This particular module is available under the MIT license. All of the source files are available on GitHub here.

Source Files

Panel design files

Images

Schematic Board Layout Panel layout