Parts List:
Raspberry Pi Zero W
3.5" TFT Back-up Camera Monitor
Common Ground 4-Button PCB
Leonardo Pro Micro ATmega32U4
Salvaged/cast buttons
Arduino Powerboost 1000C
Radioshack 3500mAh Lithium Polymer 3.7V USB charging bank
PAM8302 Amplifier
Salvaged stereo 8 Ohm .5W speakers
Salvaged USB Hub 1 Input, 4 Output
Oshpark Power Strip
32GB Kingston microSD Class 10
Salvaged DS Lite Cartridge SlotScrapped GBC game (JPN Tomagotchi)
Assorted parts, wires, resistors, capacitors, etc
The board itself has no markings on the back, "FY-3500" on the front, and identifies the voltage regulator IC as "LM2576-3.3" According to Texas Instruments Data sheet, the far left pin on the IC is the power input at 3.3v. I thought I might have to jump the hot wire from the Pi to that, but I was curious to see and tried it. No jump needed. One quirk though, like wermy's original, this one does require both yellow and white wires to be connected in the same way.
If you want to give it a shot, here's the eBay listing I ordered from:
http://www.ebay.com/itm/172541289908?_t ... EBIDX%3AIT
Being a designer with large hands, I was trying out different options for the shoulder buttons. I think I'll end up modifying these and casting them from scratch, but the L1/R1 buttons from Playstation controllers look promising with some modification.