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The touching interlock electric switch circuit

2017-01-08 00:02  
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The touching interlock electric switch circuit
The touching interlock electric switch circuit
Usually, the RC of the phase inverter input terminal makes the output terminal 0, when touching the line i (i=0,1,2```7), the signal that is inducted by human body is sent to Di terminal and CLK terminal of 74LS374 respectively, at the moment, the CLK has the rising cause, so the state of D (except Di=1, others are 0) is locked on the Q terminal(Qi=Di=1), the corresponding LED is glowing; when the signal is gone(means no touch), the circuit is reset, so CLK has no rising cause.Therefore, only one line of lights are glowing when only one line is touched, which can fulfill the aim of interlocking and indication.