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Hi,
I want to build an alarm circuit for gas leakage using mq-6 sensor.
below the circuit i want to try, does it work correctly or need any modification?
I want to turn a load like light on for a certain time when one of elevator buttons pressed say button 1 and while the button pressed the load should be on.
In the figure below circuit 1 describe how the controller of the elevator read button .
I tried two circuits to get low signal to trigger...
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