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Originally Posted by Rickertsen2
We have done this with an array of relays for the last two years and had no problems with inspection. I havn't read the rules carefully enough to see if it is legal this year though.
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It Looks to me like Rule R51 prohibits this sort of thing. There may be a loophole however. I believe that all the jumper does is pull a pin either high or low. there is no rule that i can see that prevents you from directly connecting this pin to a digital output. I wouldn't consider this a "custom circuit". This may be a loophole but i feel it does not go against the spirit of any rules. You are not providing a PWM outpur, not directly controlling movement and not posing a safety rist. BTW I believe the signal pin is the middle one.
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This method (direct connection to the controller) was addressed last year in Q and A on the first site, and as I recall was not allowed, The relay method would seem logical even if you have to drive it with a spike. I would suggest spell out exactly how, including a wiring example and submit it to the Q and A process.
Thanks in advance -Biff