Touch plate relay circuit

Published:2011/6/19 21:57:00 Author:TaoXi | Keyword: Touch plate, relay circuit | From:SeekIC

The touch plate relay circuit is as shown in the figure, when the finger touches the 2 inches sheetmetal, the induction AC signal makes the MOSFET drain current to 1.7mA, the relay gets the power to close, if you connect the capacitor to the relay coil in parallel, you can delay the release.



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