Quote:
Originally Posted by daplatapus
Well, I had a good talk with an electrician that I use and he helped me wade through some of the dilemma's I've had. He's not a electronics guy, just a sparky who does house and commercial wiring but his code book pointed us in the direction I think I needed. Turns out a 18AWG wire all by itself in the open air can carry 10A but it's de-rated once it's bundled with a bunch of others. The ratio of decreased carrying capacity depends on how many wires it's run with. But according to our math 18AWG should be fine for what I'm doing. And as it turns out he had a roll of 18/21 sitting in his shop he gave me for $2/ft. It is fire alarm wiring.
And I also got some other goodies in the mail yesterday. Now all I have to do is figure out how it works 
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daplatapus,
Send me a close up digital picture of the header pins for input.
I just received mine last week but the 4 relay version. The relay modules are opto-iso which will require the pin to be tied to gnd to latch. From what I've found out over the last week, the opto-iso is not compatible with the Jarduino.
Simply put........the relay board latches on GND but eventually becomes inconsistent also latching on 3.3 to 5VDC.