Hey Hammerline, big thanks for your support for this project idea and your interest in wanting to build and test your own ARC based 4 lane system. I will share progress on this project either here or on slotforum.com but whichever site I use I will cross-reference with hyperlinks.
In terms of system development, I have the support of fellow slotracers in Scandinavia... and I have committed to share a first version for testing. I am working on this hardware/firmware solution at present. Later in the summer I hope to have upgrade parts designed. Perhaps that would be the time to bringyour soldering iron into play.
And just to add... the hardware/firmware requirements I am working on are:
1/ Additional power regular (5V) which is integral to the ARC PRO and which draws on the 15V dc input and which has its own overload protection circuits.
2/ A PIC16F1619 microcontroller which combines all the lane sensor signals and re-times these signals to avoid data collisions or ambiguities.
Again, many thanks for your interest and please keep in touch, your 4 lane digital race evenings sound great :)