Build Instructions

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• 1

  PCB Assembly

  The assembling process was not too difficult because this PCB is a through-hole board without any SMD components.

  First, we installed two CON7 header pin sockets in their place, and after that, we added the CON3 UC203 connector to the PCB.
  Next, we use a soldering iron to solder the CON7 and CON3 pads.
  Next, we align the XIAO with the two CON7 header pins and connect the potentiometer's wire harness to the CON3.

• 2

  CODE

  Here's the sketch that we used in this project to control the PC's volume, and it utilizes the HID protocol using an XIAO microcontroller. This was because of the microchip's SAMD21G18 inside the XIAO SAMD21.

  #include <HID-Project.h> //include HID_Project library
  #include <HID-Settings.h>
  #define REVERSED false           
  
  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(D0);                      //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);                        
  }

• 3

  Frame Assembly

  Prior to beginning the assembly process, we connected the two frames together and joined them from the input side using the Pi1000 logo.

  Four M2 screws are used to fasten the Pi1000 logo to the frame.

  We added an additional logo piece from the other side and used M2 screws to fasten the frame together.

  Here, the Two Logo has two purposes: one, it joins the two frame sections to form a single, large frame; second, it just looks good.

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