Published October 10, 2020 © LGPL

HID Volume Knob with Pro Micro

Just another Pro micro Volume Knob Setup with POTENTIOMETER

BeginnerFull instructions provided6 minutes16,925

Things used in this project

Hardware components

SparkFun Electronics Pro Micro - 5V/16MHz

Arduino Leonardo

Rotary potentiometer (generic)

UTSOURCE Electronic Parts

Story

Fun Fact, you can turn your Pro Micro Board into an Interactive USB Input Device like a keyboard, mouse, gamepad or even a Volume control knob.

By using HID Library or other USB libraries supported by Pro micro.

The Pro Micro is a tiny, Arduino-compatible microcontroller centred around an ATmega32U4 - an 8-bit AVR.

The ATmega32U4 comes equipped with a full-speedUSB transceiver

when you connect the Arduino to your computer, they're connected directly over the USB bus, The Pro Micro can be programmed to emulate any USB device you could imagine. You can even program it to act just like a mouse, keyboard or any other HID-class USB device, in our case a "USB VOLUME CONTROLLER"

Materials Required-

just a 10K potentiometer
a pro micro or a Leonardo
Breadboard
connecting wires

Thanks, UTSOURCE.net to offer electronic components for this project! you can check UTSOURCE.net, they deal in all kinds of electronics components like for example all the Components used in this project!

STEP 1

well, first we need to install the HID Library from library manager menu in Arduino IDE.

Just open Arduino IDE, select Sketch tab and Include Library > Manage Libraries. Then a window will pop up.

Search HID-Project in the search bar and install HID-Project by NicoHood.

after installing the library, reopen the Arduino IDE and open the attached sketch file.

STEP 2

Wire the POT with Arduino Pro micro according to this scheme-

VCC to VCC of Potentiometer

GND to? GND!

and Analog port of pot to A0 of Pro Micro.

And that's pretty much it.

RESULT

Further Scope

we can design a proper encloser for this setup which houses the pro micro and potentiometer properly and have a big knob for controlling the volume properly.

maybe I'll make a V2 of this setup in which I'll even add a few cherry MX keys and a Bare atmega32U chip on a PCB and setup it in a 3D printed body.

for now, this is it.

if you guys run into any problem, just leave a comment!

Code

HID Volume Knob

#include <HID-Project.h>                    //include HID_Project library
#include <HID-Settings.h>

#define REVERSED false                      //if your controller is reversed change it to true

int val = 0;
int previousval = 0;
int val2 = 0;

void setup() {
  Consumer.begin();                         //initialize computer connection
  delay(1000);                              //wait for computer to connect
  for(int a = 0; a < 52; a++) {
    Consumer.write(MEDIA_VOLUME_DOWN);      //set the volume to 0
    delay(2);
  }
}

void loop() {
  val = analogRead(A0);                      //read potentiometer value
  val = map(val, 0, 1023, 0, 101);          //map it to 102 steps
  if(REVERSED) {
    val = 101 - val;
  }
  if(abs(val - previousval) > 1) {          //check if potentiometer value has changed
    previousval = val;
    val /= 2;                               //divide it by 2 to get 51 steps
    while(val2 < val) {
      Consumer.write(MEDIA_VOLUME_UP);      //turn volume up to appropiate level
      val2++;
      delay(2);
    }
    while(val2 > val) {
      Consumer.write(MEDIA_VOLUME_DOWN);    //turn volume down to appropiate level
      val2--;
      delay(2);
    }
  }
  delay(301);                               //wait at least 300ms between changing volume levels
}                                           //if it will change faster Windows can sometimes 
                                            //increase or decrease volume by 10 steps at once

Credits

Arnov Sharma

403 projects • 444 followers

I'm Arnov. I build, design, and experiment with tech; 3D printing, PCB design, and retro consoles are my jam.

HID Volume Knob with Pro Micro

Things used in this project

Hardware components

Story

Materials Required-

STEP 1

STEP 2

RESULT

Further Scope

Schematics

sch

Code

HID Volume Knob

Credits

Arnov Sharma

Comments

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HID Volume Knob with Pro Micro

HID Volume Knob with Pro Micro

Things used in this project

Hardware components

Story

Materials Required-

STEP 1

STEP 2

RESULT

Further Scope

Schematics

sch

Code

HID Volume Knob

Credits

Arnov Sharma

Comments

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