This circuit is STOPWATCH project board which can be used to count time display by 4 digit LED seven segment.

Technical information:
- Need Power Supply 9-12VDC ( Current consume 60mA )
- 2 Mode of operation ( STOPWATCH and normal Digit WATCH )
- Start / Stop / Clear / Sec button to start and stop watch
- Maximum Stop watch time 23 hours 59minutes and 59second.
- PCB Size : 7.8cm x 5.4cm  ( H = 3.6cm )