Coining Up the Bellco using an Arduino Nano

[Mcrowell75]

I’ve traced my power problem To a bad ballast in the belly glass. Moving on…

My stop buttons do complete a circuit when pressed. The voltage reads just under 2v dc. The arduino guys say that’s odd and low but not necessarily a problem. I’ve decided to use a 4 channel relay module wired in series with the buttons to stop the reels.

To trigger the autostop relays I’d like to take the signal from the spin lever. It is an optocoupler on my machine. In the photo you can see the connection. It is the 3 wired plug 2nd from the right.

Here’s where I need advice. Which of those 3 wires should be the one I’m wiring to my arduino in order to trigger the autostop function? I want to be careful because I suspect that’s one of the possibilities of my blowout last week.