PSN-L Email List Message
Subject: Coil and Magnets or Led and photo transistor
From: "tchannel" tchannel@............
Date: Mon, 9 Feb 2009 17:53:48 -0700
Another question about this site........he uses a LED and Photo =
Transistor in place of the coil and magnet. I have never used this. =
Is one better than the other? This approach would be smaller and =
Another question about this =
uses a LED and Photo Transistor in place of the coil and =
have never used this. Is one better than the other? =
approach would be smaller and lighter.
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