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Author Message   Mareklew Tinkerer Username: Mareklew Post Number: 162 Registered: 03-2010 Rating: N/A Votes: 0 Posted on Saturday, August 07, 2010 - 04:57 am:    Try the circuit from Ron, it works best albeit requires power. To check the PC side, just plug a mike jack in, nothing attached, you should get noticeable increase in signal level as soon as you touch middle contact with your bare finger. If you don't -> something is wrong with sound card settings or recording levels. If you do, that part is okay and you need better sensor. Marek