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How to Build the AI018 DIY Stereo Matrix Mixer

AI Synthesis
DIY Stereo Matrix Mixer
DIY Stereo Matrix Mixer

How to Build the AI018 Stereo Matrix Mixer

This is the build guide for the AI018 Stereo Matrix Mixer

Buy the Eurorack Stereo Matrix Mixer

Table of Contents

  1. Resources
  2. About the AI018 DIY Stereo Matrix Mixer
  3. Tools Needed
  4. BOM (Bill of Materials)
  5. Build Guide

1. Resources

  1. Schematic
  2. Printable Build Guide
  3. Manual

 

2. About the DIY Stereo Matrix Mixer

The AI018 DIY Stereo Mixer allows you to create complicated and creative stereo mixes, including feedback patches..

3. Tools Needed

For testing and Calibration:

 

4. BOM

Category Part Quantity Designation
Capacitor 10uF Capacitor 2 C1-2
Capacitor .1uF Capacitor 4 C3-6
Hardware Shrouded Power Header 1 Power
Hardware Jack 16 In L, R 1-4; Out L, R A-D
Hardware 10 Pin Plug Header 2 n/a
Hardware 10 Pin Socket Header 2 n/a
Hardware 14 Pin IC Socket 4 U1-4
IC TL074 4 U1-4
Nut Nut 16
Potentiometer 9mm Alpha Potentiometer DUAL A100K 16 A-D, Mix 1-4
Resistor 10 Ohm Resistor 2 R1-2
Resistor 1K Resistor 8 R18, 22, 26, 62-66
Resistor 100K Resistor 56 R3-17, R19-21, R23-25, R27-61,

5. Build Guide

  1. As usual, we solder from “low items to high items.” First solder the two 10 ohm resistors.
  2. Now solder the eight 1k resistors near the output jacks.
  3. Now solder the 56(!) 100K resistors. It’s a lot but after this it’s really easy.
  4. Now solder the Power Header, which will take pressure off the caps we’re about to install.
  5. Now solder the four .1uF caps that are part of the power filtering circuit.
  6. Now solder the four 14 pin sockets and then place in the TL074s. Make sure the “dot” on the ICs is pointed the right way.
  7. Now solder the two 10uF Capacitors, minding the orientation.
  8. Now solder the 2 sets of 10 pin sockets and plugs. In the end, the power header and jacks will face opposite. I like to always put the plug headers on the “bottom’ board, but you can do as you like.
  9. Now solder the jacks. I like to lay the PCB flat and place in the jacks and then solder the ground lugs (the ones that stick out) from the top. Once those are in I turn the board over and solder/reflow all the jack pins.
  10. Now solder in the 16 dual A100k Pots. I place them in the PCB and then put the panel on it. I’ll put on four nuts on the soldered jacks, and with the panel secure over the pots, turn the PCB and Panel over and solder the pots.
  11. Now We’re done! Perform a Continuity Test and power on if there are no shorts between +, -, and GND.

Congratulations!

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If you are having any issues at all, please contact me at: https://aisynthesis.com/contact/.

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