Stopwatch Using 4 Digit 7 Segment Display & Arduino

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In this project, we have designed Simple Stopwatch Using 4 Digit 7 Segment Display & Arduino with Start, Stop & Reset Button. A stopwatch will always have 2 buttons or modes, a start, and a stop mode. It may have other features but it will always have these. Additionally, we have added reset function too. This can be done with pressing reset button of Arduino.
The 4 digits common anode 7 segment display is interfaced with MAX7219 LED Driver IC. The stopwatch can be used to measure up to 999.9 seconds.

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Комментарии
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i have a common cathode how can i operate it please? what should i do exactly???

MohammedRiad
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I think that all the code referring to sw2 does not work as well as a1, b1, c1 and d1 are not connected to the chip max7219...

josemiguez
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Hi Alex can I use at89c2051-24pu microcontroller??

sitrcentc
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Very nice. Can you help me becouse I use 7 segment display with conectros use I2c (TM1637).

Jan_On
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Sir i want to make this project but iam doing this for first time sir i will follow your instructions and make it then it will work perfectly na

riteshprajapati