lap counter/timer

12-22 — elektor december 1981 lap counter/timer lap eminter/timer This project will be welcomed by all members of the slot racing fraternity, young and old alike. It provides the home slot racing track with complete electronic lap counting and timing thus bringing it into line with all the well-known racing circuits throughout the world. A. Schwall The circuit supplies the race data for a race track with two cars. Either car has the facilities of a stopwatch and a lap counter at its disposal. The number of laps in the race is set before the race and the stopwatch begins to run when the race is started. Each time a car passes the finish line one lap is substracted from the counter. When a car completes the required number of laps, the clock will stop, enabling the race time to be read. Furthermore, since the race is over, power to the track is switched off. Block diagram The block diagram of the counter/timer is shown in figure 1. Pressing the "start" button will set the timer to...