Track Coach here.... My school still uses an Ultrak L10 to time meets and I am looking for a way to DIY a solution to simplify and standardize the start of a race. Currently we just have the "head timer" watch for the smoke of the starting pistol to operate a plunger that closes a contact to start the timer. I would love to put together a system that has 2 parts, transmitter (Starter pistol end) and receiver (Timer end). We have a minimal budget so I would be purchasing and building everything myself.
Starter is wearing the Transmitter (clip on to belt, maybe wristband?)
Receiver end plugged into Timer
Normally Open Contact
Starter fires pistol and Transmitter picks up Audio signal
Max distance would be 500'
Line of sight, no trees or other obstacles
Receiver picks up signal and closes contact
Momentary, not maintained
System is ready after each shot
