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measuring PW length?

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MrDEB

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found this interesting website using antennas/ capacitive conductance to control a robot.
Am interested in using this THEREMIN theory principal to control a musical instrutment called a THEREMIN but want to use photo transistors instead of antennas. Intergrate a PIC into the mix instead of a stamp.
this website shows how but integrating into what I want??
my thoughts= using the phototransistors to control the 555 frequency instead of antennas and then continue on as the web link suggests.
any ideas?
http://thereminvision.com/version-2/TV-II-index.html
I want to find out what uf in seconds is?? = .0001??
 
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