Touch switch

200

02:22:37

The switch is your finger tip and 300k ohms is taken as an approximate value of your finger resistance. The low voltage is amplified and when current is fed through the base, transistor switches the current and led glows.. As long as you press it.

published 11 years ago

thebugger

11 years ago

It doesn't have to be this hard. You can use a darlington pair to do it.

Sathyaram

11 years ago

K.. I'll try..

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