LED as light emitter and light detector - Page 2 — Parallax Forums

LED as light emitter and light detector

virtuPIC · 2009-05-10 08:53:15

Well, the idea is not that new. You can find it on many pages related to other controllers. However, I've not found an implementation on the prop so far. LED means Light Emitting Diode. And if you give a reverse voltage to a semiconductor diode it has a certain capacitance. Even better: The leakage current of such a diode…

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