Here are the first version of the electronic!

It's funny to see le IR led on camera! the sensor work very well even in front of the sun.

But the IR not pass throught the original plexiglass and I don't want to cut it with laser, and the 50Hz/60Hz too present with neon light.

And the sound can be good for a guitar, but the CD4069UB are too linear to  handle the end of the sound and become just noisy. The sound does not sound like a gameboy

LET'S FIND ANOTHER WAY !!!!!