Yes! LEDs as photometers is something that you don't really see around much anymore, but it is really cool. Even an LED matrix can be used as a self-illuminatin

Yes! LEDs as photometers is something that you don't really see around much anymore, but it is really cool. Even an LED matrix can be used as a self-illuminating proximity sensor with the right setup. https://www.youtube.com/watch?v=GaAtpAuNN_o https://www.youtube.com/watch?v=GaAtpAuNN_o