Fully Automatic Timing
Race: 100m · Heat 1
Tip: clap once and watch the level. Set the threshold just above ambient noise so only the gun crosses it.
After a trigger fires you must press ARM again (anti-false-trigger). For 15 s after each start the mic listens for a second shot = false-start recall (the button above is the manual backup): finish phones stop and reset, the heat stays put, and you re-ARM for the restart.