Quasar ElectronicsAS3129KT - Up-Down 4 Digit LED Counterhttp://www.quasarelectronics.co.uk/media/ecom/prodsm/3129_small.jpgLow cost up-down event counter. 4 digit LED display - expandable to 8. Counts either up or down. Range 0000 to 9999. Reset - Up - Down - Disable. 9-15Vdc. Overflow output. Click Product Title for full details.Electronics > Circuit Components > Printed Circuit Boards > Development Boardsquasar-diy-k1293129KT24.95Quasar Electronics Limitednewin stockhttp://www.quasarelectronics.co.uk/Item/3129-up-down-4-digit-led-event-counter
Low cost up-down event counter with 4 digit LED display (expandable to 8). Count either up or down in from 0000 to 9999.
Inputs are triggered by any 'make' contact so it can be used to count pulses from switches, relays, open collector outputs or simply push buttons. For example, a turnstile micro switch or relay output from an infra-red security beam (our kit 3130) counting cars, people or items on a conveyor belt. The input must opened before another count can be registered.
Overflow output pulses low when the count wraps around to zero. This output allows two counters to be connected together to make an 8 digit counter.