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Using Arduino => General Electronics => Topic started by: Colin8128 on Nov 27, 2020, 11:06 pm

Title: How to Switch a Circuit based on Whether Another Circuit is Open or Closed
Post by: Colin8128 on Nov 27, 2020, 11:06 pm
Hello,

I need to switch a circuit based on whether another circuit (a millivolt circuit without meaningful voltage) is open or closed but I am not familiar with any component that can achieve this.  A multimeter has a continuity checker that can tell if the circuit is open or closed but how would I trigger a switch based on this?

Thanks!
Title: Re: How to Switch a Circuit based on Whether Another Circuit is Open or Closed
Post by: Paul_KD7HB on Nov 28, 2020, 12:36 am
Quote from: Colin8128 on Nov 27, 2020, 11:06 pm
Hello,

I need to switch a circuit based on whether another circuit (a millivolt circuit without meaningful voltage) is open or closed but I am not familiar with any component that can achieve this.  A multimeter has a continuity checker that can tell if the circuit is open or closed but how would I trigger a switch based on this?

Thanks!
A multimeter tests continuity by passing a current through a circuit(probe tips and the test materiel) and measuring the voltage across a series resistor. You can do the same.
Paul
Title: Re: How to do something based on something or other ...
Post by: Paul__B on Nov 28, 2020, 02:16 am
Sorry, no actual details, no sensible answers!  :smiley-roll:
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