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Author Topic: Multiple Relays for outlet control  (Read 1483 times)
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Pittsburgh, PA
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Thanks for the input Tom.  Its a really basic bench supply I hacked together years ago from a PC power supply(400w), so I'll check and see about the voltage dropout.  It seems that it should be plenty of power, but you could be right.

As for relay 3 and 4, yeah they work.  Sorry I forgot to mention that little bit.

I decided for fun to just lose the relays and go back to basics with a set of LED's both to test the programing and make sure I was on the right track, and everything works as I expected.  In the process of hooking everything up I realized that I'm not using the same ground to power the Arduino that is on the bench supply.  I've got the arduino hooked up to a laptop to power it.  I guess I kinda assumed that everything goes back to the same place anyway... but maybe thats the missing link here?
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Victoria, Australia
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Hi, thanks for reply, yes, not joining gnds will probably be the cause.
Awaiting your results.

Tom... smiley
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Everything runs on smoke, let the smoke out, it stops running......VK3DMK

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It really was that simple.  I just need to get the common ground and then everything works.  Thanks so much for your help Tom.  Now on to building something really fun!
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