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AS3154KT - 4 Digit Presettable LED Down Counter

Ability Level 2: ModerateProduct Formats Available : Pre-Assembled Module (AS) or
Self-Assembly Electronic Kit ( Soldering Required)

Low cost micro-controller based 4 digit presettable LED down counter with four operating modes that control how the output behaves when count reaches zero. Suitable for low to high speed applications (30 to 4100cps). Ideal for process control and counting applications.

Accepts inputs from any make contact so can be used with pulses from switches, relays, open collectors outputs or simply push buttons.

Two onboard push button switches (SET and INC) are used to preset the starting count and select the operating mode.

Inputs for Count, Rate (debounce) and Reset (to preset value). Output is an open collector transistor (NPN, 100mA @30V). This can be used with to drive our 3156 relay boards or the 3141 delay timer board.

The four operating modes are detailed in the User Manual (see Technical Specifications table below).

Count, Reset, Rate, Output and Power In are brought out to a 10-way header strip for easy connection. The board has Power In reverse polarity protection.

e.g. Order Code 660.446UK with connector 778.106
Current20 - 50mA max.
Operating modesCount Stop, Output Hold
Over-Count, Output Hold
Auto-Reset, One-Shot Output
Over-Count, One-Shot Output
Count range0000 to 9999 (10,000 max)
Count speed
Low: 30 cps (15mS high, 15mS low)
High: 30,000 cps (measured)
InputsReset / Count / Rate
Input triggermake contact e.g. switches, relays, open collector outputs or simply push buttons
Output TypeOpen Collector Transistor, NPN, 100mA @ 30V
(see Help Sheet)
Display4-digit 7-segment with decimal point, 14mm RED LED
Board Dimensions51x64mm
Connections10 pin SIL header
Product FormatsSELF-ASSEMBLY Electronic Kit (KT) or
PRE-ASSEMBLED Electronic Module (AS) Product Formats Info
DocumentationUser Manual
  • The pre-programmed firmware chips supplied with the kit or assembled formats below can also be purchased separately on our Firmware Chips page.
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