Electric timing device for use by athletic trainers during training of analysis of athletic runners, has radio emitter sending departure code to chronometer or to display to start incrementation to specific second when flash is emitted

摘要

The device has a microcontroller whose output is connected to a departure coder on a negative power supply that passes from high state to low state, where vocal commands recorded in EPROM are sent by the microcontroller through an audio transformation circuit to audio amplifiers that activate loud speakers and an observed athlete. A departure code is sent by the radio emitter to a chronometer or to the display to start the incrementation to one-thousandth of second when a flash is emitted.