[woodcote]

Hi Goggles. I don't know if the Race Coordinator documentation has been updated - I was using the 'Race Coordinator Arduino Interface rev 1.2.0' document.

In that document, relays are only being used to turn the track power on and off (eg for a dead start and at the end of the race). The deadstrip paragraph hadn't been completed. Maybe it has now?

In my single-lane rally loop set-up I'm using the relay to separate the rather fiesty signal from the deadstrip from the delicate Arduino input. For a four-lane deadstrip, a four-relay module would be required, going to pins 4-7 on the Arduino.

I don't use an additional relay to switch the track power, but a four-lane module would be controlled by pins 8-11 on the Arduino.

I hope that helps.