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Thread: Does SSREz require current sinking?

  1. #1
    Join Date
    Oct 2009
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    Default Does SSREz require current sinking?

    I had several SSREz relays connected to an Arduino Mega (5V). I had some serial I/O performance problems with the mega so I tried switching to the Arduino Due (3.3V). To my surprise the SSREz seemed to work just fine in initial testing, however during my show I noticed random flickering when everything was supposed to be off. I suspect the 3.3V output is fluctuating (dropping) causing the relay to turn on briefly.

    I believe I have the SSREz wired so that the Arduino is sinking current to turn them on. Could they be wired so that the Arduino is sourcing current instead?

    I was considering buying a level shifter to get the control signal back up to 5V. However I can't tell from the specs on this product if it supports current sinking as I am not a EE.
    http://http://www.gravitech.us/mi5v3lesh.html
    Last edited by JCB; 02-03-2018 at 01:19 AM.

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