- Published in issue 1/1991 on page 52
Advanced input stage for left/right rev counter
Most left / righr revolurion counters are based on a shutter fixed on the axle of the motor that inrerruprs two infra-red sensors-. Whether the counter counts up or down depends cn which IR sensor is interrupred in the First place. Most constructors connect the IR sensors directly to the input of the counter. The minimurn distance between the sensors is normally 5 mm.