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@skyblond I'm familiar with the video. I knew about the idea long before that video but that video was the first time I saw it in action without actually frying the solar panel.

You may forget it but he actually also shows that leds are receptive in that video.

The fact you can use them both at the same time like that is something I thought was possible years ago when I heard about this and found people had done it once I started searching youtube. It makes sense.

That said its not a very practical way. You can actually detect the change in capacitance of the LED (which works even when it isnt powered) and get more accurate results and the same effect. So its not something I would ever expect to be used commercially.