While on the subject of Gameboys here is more info on the latest opto-theremin I custom built. This time I was able to score a complete intact system with the screen protector. Of course the first step was to discard the guts, for later use 🙂 This version was kept as stock looking as possible. Existing buttons were drilled and glued in place to house photo resistors. Select and Start buttons have surface mount switches behind them for sound muting of the left and right channels. The headphone jack assembly was left intact and with the filter stage utilized. Dot Matrix Screen was replaced with a holographic sticker on the back side. Few more images can be also found in the Gallery section of the site and of course a quick video of the theremin being played is available for viewing. Enjoy.