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Practical 3-button interlock electronic switch circuit

2017-01-08 09:34  
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Practical 3-button interlock electronic switch circuit
The circuit structure is simple, when you press any key, the corresponding channel opens. And the contact point's jitter does not affect the circuit's working, so this circuit has the good anti-interference performance. If you remove the rear driver transistor, the circuit's static power consumption is nearly zero. If you remove the button, this circuit can be used to control the pulse.