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Touch Biostable Controller Circuit

2015-01-05 08:30  
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Touch Biostable Controller Circuit
Feet 6 and 2 of 555 are connected with the inphase and inverse input ends of comparator A1 and A2 within the substrate respectively to control its state of reset and set to change its output state. Touching metal A will reset 555, and LED (green) will be enlightened and LED1 (red) will go out; Touching metal 8 will enlighten LED2 and quench LED1 . If the relay is changed over, the control of on-off of power supply for the executive circuit can be achieved.