I had to modify the Relay boards – The relays were getting VERY hot. Turned out to be a fault in the design – the 5V relays were being run from the 12V supply. Simple fix to cut a trace, and run a wire to the output of the on-board 5V supply. I guess that explains why they were $6 a board 🙂
And a quick look at the half-finished Relay driver board! That’s 6 x 74HC255’s and 6x 74HC244’s
0 Comments.