Automatic switch

Help & Support
1

Hi,

I’m looking for an automatic switch that will shut down a circuit for x seconds when the voltage across a battery is below a certain value.

Thanks !

2

Hi!

You might need to get a bit imaginative as what you want doesn’t really exist out of the box.
I’d say you would at least need the following parts:

  • Arduino (or any micro controller with any analog inputs)
  • Relay
  • Op-amp
  • Resistors
  • Potentiometer

You’d start by lowering the voltage of the battery to a readable value for the Arduino with the Op-amp (0-5V).
Then, you make the battery run through the relay, so that the Arduino can trigger it.
When the micro controller reads a low enough value, you make it open the relay for a certain amount of time.

Here are some guides that can help you do that:

Good luck!

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