Introduction: Counter (0=> 99) Using Arduino UNO and Two 7display Segmments

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About: Electronic hobbyist ! and Arduino Lover !

hi !

this is my first instructable , this instuctable concern making a counter ( 0 => 99 ) .

Step 1: Step 1 : Realize the Montage

parts needed :


  1. 2 displays 7segmment common anode
  2. 4 resistors : 2 ( 2.2k ) on the bases of the two transistors + 2 ( 220 ) protections 7 segments displays.
  3. 2 NPN bipolar transistors of 2N2222 reference, where equivalent ( BC547 ) .
  4. 7segment BCD decoder ,reference SN7447AN .
  5. Arduino UNO Card .
  6. Wires .

Step 2: Step 2 : the Code

the code is set to run counting bu 500 ms , you can change it to 1 second if you wont to use this counter as a chronometer ..

here in the code => while((millis()-temps) < 500)

Attachments

Step 3: Step 3: Starting Counting