Alright, the build is finished and all desired functionality works:
- Hard power button (toggles 12V DC input)
- Soft power button, will send shutdown command to Rpi4, and can then also turn it back on (as long as Hard power is still on)
- 7" Touchscreen that displays album art, track info, and playback control
- Playback + Volume buttons, which are a bit redundant with the touchscreen, but I prefer physical buttons anyway
- Dual 12V Trigger functionality, that will turn on my power amp as well as toggle my
input switch box I built (in another thread around here)
- Master volume control in the back to set the maximum output for the DAC, and then use software volume control for controlling output during playback. Thus allows me to control volume from my phone, and also means I don't accidentally blow up my speakers
- Using 2 buck converters to step down 12VDC to 9VDC for the DAC (Orchardaudio Pecan Pi DAC), and 5VDC for the 7" display + Rpi.
- All running on Volumio 3.
It's a bit of a wire mess, most of it from the pushbuttons connected to GPIO pins on the Rpi4.
@orchardaudio Finally putting your DAC to good use
View attachment 185458
View attachment 185459
Very pleased with this build