4 Digit Stopwatch Timer Board with Pause (9999H 59M 59S)

1 Second resolution 4-digit stopwatch timer board with Start, Pause, Stop, Display Toggle and Reset functions. Displays time elapsed in Minutes and Seconds (MM.SS). At the end of every minute the display changes over for 1 second to show the elapsed Hours (HHHH). It then reverts to displaying and counting Seconds and Minutes. An open collector output pulses low for 20mS on the minute when the timer is running. Maximum time is 9999H 59M 59S.

The stopwatch controls are:

• START : press the START button to start timer if stopped, paused or reset
• PAUSE : press the START button when timer is running to freeze display at the current elapsed time. Timer still runs in the background, only the display has been stopped. The output pulse every minute will continue because the timer is still running. Press the START button again to re-start the display. It will jump to show the current elapsed time
• STOP : pressing the STOP button when the timer is running also freezes the display. However, the timer is stopped as well and the output pulses are also stopped. Press the START button to re-start the display. It will continue counting on from where it was stopped
• DISPLAY TOGGLING : Pressing the STOP button when the display is frozen (paused or stopped) will toggle between Minutes/Seconds and Hours display
• RESET : at any time you can reset the timer by shorting the hardware reset pins together. You can also reset the timer when it is stopped or paused by holding the STOP button for 0.5 seconds

The board has an active low open collector transistor output (NPN 100mA, 30V max.). This can be used to drive a buzzer, relay, our 3156 relay board or 3141 delay timer board.

Connections: DC IN, RESET, OUTPUT, STOP and START are brought out to a 10-way header strip for easy connection.

START and STOP buttons are also provided on the board.

If you would like the stopwatch to function differently please Contact Us with your requirements.