aspork42
commented
3 years ago Hello,
Version 2 of the PCB which is on GitHub has been converted with 'dual pattern' so you can use through-hole resistors (OR surface mount). For the other components like the capacitors, you don't actually need to use them so you can leave unpopulated. They pre-set the amplification on the DAC.
If you wanted to add an analog volume knob, you would use a potentiometer. Hook one side to 3.3v, the opposite side to GND, and the center pin (which is the analog outputs) into the "A0" pin which is the analog. You would need to update the code to read the pin, look for a change in the analog value, and update the volume setting.
Reading an analog pin on the arduino (This will basically follow the Aruduino reference using pin A0) https://www.arduino.cc/reference/en/language/functions/analog-io/analogread/
More info on reading an analog pin, along with diagram (on Arduino Uno) on how to wire it). https://microcontrollerslab.com/analogread-arduino-example/
You would probably do something like the Map() function to map the 0-1028 analog value into a 0-100 for the volume and that will constrain the values to 0-100, and scaled accordingly.
creativewitty
Hey James, MrDiy directed to me to this fork and this looks great. I know a bit about electronics but not as much..
Is there a way to convert the board to components where normal non smd components are required. and say if i wanted to add a poteniometer for volume where would that be implemented?