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  1. #1
    You won't get enough pick up from the LED lead to give you a reliable operation, if you ramp up the sensitivity you will get switching from any electrical noise, so again it won't be reliable.

  2. #2
    I don't want to mislead you this has been done, how its been done and what with I'm not sure
    I was going to use an Arduino which will easily give a output for a LED it can also be used as a sensor
    the method in combining both switch with LED would make or break it.
    this is for only a prototype, then code for 8052

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