I'm pretty handy with a welder and have a buddy with a real nice MX track. I want to build a 4 bike starting gate for him. That part is fairly easy. I want it to be automated so you don't have to get off your bike to reset it. I think I can handle the mechanics of that with an electric-over-hydraulic long-ram jack that is collecting dust in the corner of my shop. A foot or wheel activated reset switch should not be beyond me either. I come before this distinguished brain-trust today to seek advice on some sort of electronically actived (random delay even?) triggering device that I can integrate into a mechanical release. Due to my limited knowledge of electronics, my daydreaming and doodling on bar napkins ends abruptly at using an electric eye of the type used on overhead garage doors to sense obstructions to initiate the (random?) timer for the release mechanism. I'm even considering using the entire actual garage door opener (instead of the long-ram jack) to reset the gates.Resetting AND Triggering would then be a simple matter of one rider pushing a bar-mounted remote. Trouble is, that guy would have a definite advantage. How do I incorporate some kind of random delay? Lets hear some ideas!!