please help with Speed Detector - Page 3 — Parallax Forums

please help with Speed Detector

djh82uk · 2007-06-19 00:25:40

Hiya Guys Sometime last year I wrote some code for a picaxe chip to detect model train speed and output it to an LCD Screen I want to improve it to use the TV Out, and run 4 detectors at the same time. I want to use photodiodes, 1 to xmit and 1 to receive (x2). What sort of interfacing circuit will I need? I am still…

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