everything works well but there is no safe shutdown or battery monitor and I was pretty unhappy with my dremel job on the shell so my second build will have safe shutdown, battery monitor and I'll use a 3d printed stencil for a better dremel job! (also is it possible yo use Arduino pro micro as a battery monitor?)
There's also a pop with the speaker when the device turns on but I can live with it.
Another note :
Chiz's guide did not work for me with USB audio (I'm on retropie 4.4)
in his guide he tells you to go to here
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pi@retropie:~ $ sudo nano /etc/modprobe.d/alsa-base.conf
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options snd_usb_audio index=0
options snd_bcm2835 index=1
options snd slots=snd-usb-audio,snd-bcm2835
What I had to do to get my usb audio working was to go here
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sudo nano /usr/share/alsa/alsa.conf
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defaults.ctl.card 0 defaults.pcm.card 0
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defaults.ctl.card 1 defaults.pcm.card 1
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alsamixer
I hope you guys enjoy my first build