I'm trying to form ideas on a project for a class I'm taking this summer. It has to be interactive and involve Arduino. I thought about creating a shooting gallery. My intent would be to create a gun that emits IR and have each of the targets use an IR receiver. Once the IR receiver receives a signal, it will trigger an action and the target will move. The intent will also be a display with maybe a timer and also records the number of hits.
I'd like to prevent having to run wires everywhere and I would like to have the targets communicate with the "home" to record the hit.
1.) Will I need an Arduino board for each target or is there a way to trigger the targets using only 1 board? I currently have 1 Uno.
2.) Is IR the best idea for triggering the boards? I don't really think I need Xbee, but I'm not well versed in that either. My idea was to have the gun send the IR to the IR receiver at the target. The target receives the signal, triggers the motor or actuator at the target and also sends an IR signal back "home" to trigger the hit.
Will my ideas work or do I need to look into other things?