Toss trees?

[BLUEnoEQ]

WTH is this guy on about? Still tinkering with Arduino... came up with an idea. Battery powered race light tree, to clip on the dash... which has a synced up counterpart that can be tossed into the next car. One button, same timing, drivers can both look forward and go when it turns green.

So far I have one side working after about an hour of messing around. I still need to go get some correct color leds, a second UNO, 433mhz reciever and transmitter. I don't know the exact range of those things. Basically one UNO will trigger the other and have the same exact light timing.

Things being considered. Some sort of infrared alignment, where the countdown doesn't start until the door mirrors line up within reason of course. Reciever and transmitter on both sides, basically 2 identical devices and either can initiate. I want to operate them on watch batteries as well.

[BLUEnoEQ]

Okay, so I have built 2 separate circuits, they're both on the same breadboard but are powered separately, triggered by one 5v (high signal.) I also went and bought 2 433Mhz "Feathers." I can use them instead of having using Arduinos. So these things should end up smaller with a single smaller rechargeable battery. Blue light let's you know the button has been pushed, wait 3 seconds, Red lights up, yellow lights up, then both shutoff and green means go.

https://www.youtube.com/watch?v=1VBQS9sNIKc