[Dr_C]

The preliminary spec I am working towards is:

1/ an expansion board which fits into the centre zone of the track section of the ARC PRO and which is powered directly from the ARC PRO.
2/ an expansion board which will communicate directly with the lane1/lane2 sensors.
3/ an the expansion board which will also communicate directly with additional lane3/lane4 sensors.
4/ an expansion board which will have up to eight opto-isolated sensor inputs for pit-lane entry/exit sensors and zone sensors.
5/ an expansion board which will have up to two opto-isolated uart comms interfaces for gantry lighting and other ancillary function control.
6/ an expansion board which will have a high speed WiFi comms interface for configuration setup and direct wireless communications with race management software - either running on a pc or smart device.

So that’s the plan... if it can be achieved... this should represent a useful hobbyist extension of the already amazing ARC PRO.

I have been busy building the additional sensors needed to implement this extension of the system.

c