• on Miscellaneous Electronics
  • Published in issue 7/2006 on page 0
About the article

Electronic Touch Switch

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A circuit that senses the resistance of the skin and converts it into a useful switching signal. The touch switch contacts can be made from two small metal plates, rivets, nails, etcetera, which are placed close together on a non-conducting surface. In this circuit a comparator of the type LM393 has been used.
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