Proximity Sensor Switch Circuit

Question

My goal is to build a proximity sensor switch circuit that can turn an LED on OR off. If I wave my hand, the light will turn on. Similarly, the light will turn off if I wave my hand the second time. I understand about comparators and its relation to a proximity sensor circuit. I just would like to clarify about how I would use the logic output HIGH of that circuit to turn an LED on OR off.

Any idea would be appreciated.

Thank you very much.

comparator digital logic sensor switches

Any idea would be appreciated.

Thank you very much.

OXO · Answer

Feed your logic signal to the clock input of a flipflop, such as CD4013. On the 4013, connect D to /Q so it will toggle.

Q output with be your latched output.

This is just one way.. there are many other solutions.

Proximity Sensor Switch Circuit

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