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Control Electrical Relay with Another Relay

Discussion in 'Programming/Internet' started by Shannon Perkins, Oct 8, 2018.

  1. Is it possible to control a relay with the output from COM from another relay? I'm controlling the first relay successfully from the Arduino, but the second relay I've set-up with a 3.5v line from the COM of the first relay is not working.

    Is there something I'm not getting about output from the Arduino's digital pins, or something I'm not getting about how the relay uses voltage from VCC and INx?

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