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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)

Step 3: Step 3: Starting Counting

<p>This would make a good output display for any Arduino project. I have always liked lit displays as opposed to just LCD displays because they have much better visibility.</p>
<p>of curse .. this is just for beginners </p>

About This Instructable

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Bio: Electronic student ,Arduino Lover .
More by Abdelali2:Counter (0=> 99) using Arduino UNO and Two  7display segmments 
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