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Non-touch touch delay lamp circuit

2016-08-04 23:14  
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Non-touch touch delay lamp circuit
The circuit is shown as the chart, its switch panel is the full-plastic structure without any metal parts. When people use it, as long to touch the plastic panel, lights can be lit, after a delay time, the lamp is turned off. The circuit delay time depends on R2, R3 and C2's value, the data in the chart indicates the delay time being about 1 min.