Remote control light for bicycle
Scenario: MY friends and I have taken up biking, however sometimes we get a little far from each other. My concern is that if one of us blows a tire or something like a chain falls off happens, there is no way to alert whoever is in front to stop. I've tried screaming but only look like a fool to anyone's house we ride by lol.
My solution. I would like to build a remote light kit. I would like to have box with a small button (box size hopefully no bigger than 2x2 in) that could send a signal to another box on my friends bike that has a light attached to it so when I press the button (on my box) the light in the box on his bike lights up (therefore signaling him to stop).
I know nothing about remote control electronics, as far as I can figure I need some form of transmitter and receiver. Hopefully able to run off of a triple a battery or one of those CR2032 watch batteries. I would need it to be able to send the signal maybe 100 feet (but if it can go further that would be welcome)
I'm hoping maybe someone has experience with such items and might be able to suggest something... ANY help would be greatly appreciated.