3129 - Up/Down 4 Digit LED Event Counter

This low cost 4 digit LED event counter can be used to count either up or down in the range 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 infrared security beam (our kit 3130) counting cars, people or items on a conveyer belt. The contact must be released before the next count is 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.

Technical Specifications
Supply	9-15V dc (Order Code PSU446 with connector 778.106)
Current	20 - 40mA max.
Count Range	0000 to 9999 (expandable to 8 digits - see below)
Count speed	30 to 35 per second max.
Debounce Time	~15msec for each low/high or high/low
Inputs	Reset / Up / Down / Disable
Input trigger	'Make' contact e.g. switches, relays, open collector outputs or simply push buttons
Overflow output	Enables 2nd counter connection for 8 digit display
Display	4-digit 7-segment with decimal point, 14mm RED LED
Board Dimensions	51x64mm
Connections	10 pin SIL header
Product Formats	SELF-ASSEMBLY Electronic Kit (KT ) or PRE-ASSEMBLED Electronic Module (AS) more
Documentation	User Manual How To Connect Two Timers

• The pre-programmed firmware chips supplied with the kit or assembled formats below can also be purchased separately - CLICK HERE for details.