Deej sound mixer board

Add hands-on audio control to your PC setup with this DIY DEEJ sound mixer.

Built using just four sliders an Arduino Nano, a few wires, and a USB cable it’s a simple yet powerful way to control your system volume manually.

Fully compatible with the DEEJ software, this project lets you assign each slider to control audio levels for:
System sounds, Discord, Spotify, Chrome, games, and more.

Compact, easy to assemble, and perfect for streamers, gamers, or multitaskers who want physical control over their audio.

Include a detailled manual a the end of this page.

Includes STL and STEP files so you can customize the case or layout to your liking.

Printed using PLA only.

An ideal beginner-friendly electronics project that’s both fun and useful.

For more info about Deej: https://github.com/omriharel/deej

 

For this project, you will need:

• 1x Arduino nano // Amazon links
• 12x Dupont wire // Amazon links
• 1x Mini-B USB Cable
• 4x slide potentiometer // Amazon links 
• 4x m3 nut (not necessarily needed) // Amazon links 
• 4x m3 x 30mm countersunk head screw // Amazon links 

 

Instruction link :

https://instructions.online/?id=19131-soundmixer

or instruction qr code 

The download link for Deej:

https://github.com/omriharel/deej/releases/tag/v0.9.10

 

My wiring diagram:

 

The arduino code that i use:

const int NUM_SLIDERS = 4;
const int analogInputs[NUM_SLIDERS] = {A0,A1,A2,A3};
int analogSliderValues[NUM_SLIDERS];
void setup() { 
  for (int i = 0; i < NUM_SLIDERS; i++) {
    pinMode(analogInputs[i], INPUT);
  }
  Serial.begin(9600);
}
void loop() {
  updateSliderValues();
  sendSliderValues(); // Actually send data (all the time)
  // printSliderValues(); // For debug
  delay(10);
}
void updateSliderValues() {
  for (int i = 0; i < NUM_SLIDERS; i++) {
     analogSliderValues[i] = analogRead(analogInputs[i]);
  }
}
void sendSliderValues() {
  String builtString = String("");
  for (int i = 0; i < NUM_SLIDERS; i++) {
    builtString += String((int)analogSliderValues[i]);
if (i &lt; NUM_SLIDERS - 1) {
  builtString += String("|");
}

  }
  Serial.println(builtString);
}
void printSliderValues() {
  for (int i = 0; i < NUM_SLIDERS; i++) {
    String printedString = String("Slider #") + String(i + 1) + String(": ") + String(analogSliderValues[i]) + String(" mV");
    Serial.write(printedString.c_str());
if (i &lt; NUM_SLIDERS - 1) {
  Serial.write(" | ");
} else {
  Serial.write("\n");
}

  }
}

 

Note: Not all the provided information are guaranteed to work perfectly for this project — please check compatibility before purchase.