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Touch delay light circuit with digital circuit(5)

2014-12-19 21:36  
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Touch delay light circuit with digital circuit(5)
The figure is as shown, it is a touch delay light circuit which adopts dry battery as power supply, it can be put beside thepillow, at night, if you touch the sheet metal M of that small box, the small light E will keep lighting for about 2 minites automatically.


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