Posted by Murali Harikrishnan
on 1/19/2006, 6:54 am, in reply to "on off switch"
62.252.64.32
You can use a normal green led as a receiver, but the current form lashing a green laser on it is in the order of microamps. So you need an general purpose amplifier to sense this current and amplify it. This inturn can be used to trigger a relay.
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