I'm very new to this, so please forgive any comments which might appear a bit on the stupid side.
Basically, I'm planning on utilising two different guides to achieve a similar result. I'm looking at putting a zero inside a DMG01 shell, and try and keep the one usb port on the zero free for use with a keyboard.
This is my list, but to be honest I'm now leaning more towards audio via pwm. I can't see me using a Teensy as that will take up the one usb slot, so it looks like I'll have to connect to the GPIO pins from the DMG button PCB. I'm unsure whether the GPIO pins are only meant for one device, or basically if there are spare pins, then you can have as many as you want.
Can you see any problems with this since the DMG pcb only uses 11 pins and I think the PWM audio would use 2 pins?
I haven't even gotten to how to power it up yet.
Common ground dmg button pcb
http://www.ebay.co.uk/itm/Gameboy-DMG-0 ... SwnFZXXni-
USB Audio Adapter
https://thepihut.com/products/usb-audio ... 0wodDk0New
GB Conductive silicone button pads
http://www.ebay.co.uk/itm/Nintendo-Game ... Swa-dWqjVS
http://www.deadpanrobot.co.uk/en-gb/col ... hell/80040
https://www.amazon.co.uk/gp/product/B00 ... UTF8&psc=1