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Author Topic: Measuring distance and getting closer  (Read 1000 times)
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Actually, LEDs can detect light as well as emit light.  It could make your bots simpler hardware-wise to use the LEDs as input devices between blinks.

I bought some relatively cheap and bright yellow LEDs (OVLGY0C9B9) rated at 20000 mcd.  I was easily able to detect one of them shining at another one from a distance of 12 inches.  I had to be pretty accurate aiming it, which might be a good thing for your project.  The green and blue ones are even brighter.

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