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  • SZJOIN commented on Bits4Bots's instructable Simple Touch Switch 3904 NPN3 months ago
    Simple Touch Switch 3904 NPN

    Isn't it better to use a Darlington transistor?Much of the comments above I recognize as the circuit is not sensitive enough to detect the human body's resistance...Darlingtons may solve that. An alternative is to use the transistor twice where the first emitter is directly connected to the second base and both collectors are connected to the +. (a.k.a. poor man's Darlington).

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