How can I create a signaling system for theater workers?

by on November 28, 2008

Q: We have a theater and have a need for an electronic signal device that is silent with a vibrating signal. We only need for the signal to cover about 200 ft maximum. The signal must be able to be attched by wrist or in some way to the people back stage. We would need to vibrate dotts and dashes like in morris code but not that exact. Just short signals to alert if different light and stage movements. We have a limited knowledge of electronics, is there something like this we can purchas without breaking the theater bank ?