Stopwatch and Lap Time Counter

This is a very simple project about a stopwatch using Arduino Nano (or Uno R3) and a MAX7219 LED display (8 Digits x 7 Segments). The first 4 digits of display show the time in seconds and tenth of seconds. The another 4 digits show the last lap time. Due to the number of digits available on display, the maximum time count is 999.9 seconds (16 minutes and 39.9 seconds) and with a really good accuracy comparing it with another stopwatches.” #DS3231