Introduction - If you have any usage issues, please Google them yourself
The VHDL code for digital stopwatch. When the design document loaded into the target device, the designed digital stopwatch count the seconds from the 00-00-00. Until you press stop key (key switch S2). Nixie tube stop count seconds. Press the start button (key switch S1), the digital control continue to count seconds. Press the reset button (core panel reset button) to restart the stopwatch count seconds from the 00-00-00.