[_loma]

The device should operate as follows:

1. 1) On reset, all four lights are off and the timer display reads 000.
2. 2) Start a sequence that turns on one light at a time, with approximately three seconds between lights.
3. 3) After the fourth light turns on, switch all four lights off simultaneously and immediately start the reaction timer.
4. 4) Measure elapsed time in milliseconds and show it on three 7-segment displays, from 000 to 999.
5. 5) Include a Stop button that freezes the timer and holds the measured value on the displays.
6. 6) Include a Restart button that resets the display and starts the full light sequence again.
   
   wanna circuit design of this. Can any one help to design it?

 

[Alec_t]

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