I have two Arduino relay boards that control HVAC dampers. I was inspecting them, and one of them touched something it shouldn't have, and poof! smoke and fire. I immediately extinguished the flames and simultaneously jerking a lot of wires off the wall. I inventoried all the hardware, and it's good. I honestly can't remember how I had it all hooked up, though, so i'm hoping the brain-trust of this community can help me out :-).
There are two terminal distribution boards under the relays. There is a power transformer that connects to the relays via the distribution terminals.
Question: I cannot remember if the distribution blocks were connected via jumper or not. I am pretty sure they were not, but I can't bet my life on it. My hunch is that I had the positive from the power transformer connected to one, and the common/neg to the other (probably positive to the left one, if my guessing is correct).
any help from someone who is more familiar with relays than me would be very appreciated!
Ian
There are two terminal distribution boards under the relays. There is a power transformer that connects to the relays via the distribution terminals.
Question: I cannot remember if the distribution blocks were connected via jumper or not. I am pretty sure they were not, but I can't bet my life on it. My hunch is that I had the positive from the power transformer connected to one, and the common/neg to the other (probably positive to the left one, if my guessing is correct).
any help from someone who is more familiar with relays than me would be very appreciated!
Ian
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