Is the use of a optocoupler good for this application?

Neil Swiff asked Dec 16,2020
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There is a power source of 75V and I want my Arduino to acknowledge when a switch has been activated. Such as when a switch closes it can read that it has been closed and perform a certain action. Is the use of a optocoupler good for this since there are no mechanical moving parts thus no possible switch bouncing? Or would it make more sense to use a buck converter to step it down to 5V and just have a SPST and have the Arduino read that instead?

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    if you dont use opto maybe it burns your arduino

    Dec 29,20200 Comments
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  • 1

    Yes, you can use optocoupler to do this, you can use phototransistor output (so open-collector) to drive a digital input (with external pull-up resistor or internal one if available). Buck converter, in my opinion, is worthless solution. Here an example:

    Dec 16,20200 Comments
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