Lap counter for toy car track - uses permanent magnetic field working with sound generator connected to electronic storage with indicator system

摘要

Lap counter for a toy car track has free track change over for a car. The lap counter works electronically and without contacts and includes an indicator system. A permanent magnet (10) with a predetermined magnetic field is attached to the toy car (6, 7) with a sound generator (12) acting on the magnetic field being fitted in the area of each track (3, 4). An evaluating circuit is connected to each sound generator which produces a signal corresp. to the magnetic field to a common electronic storage counter to which the indicator device (14) is connected.