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- // Arduino 7 segment display example software
- // http://www.hacktronics.com/Tutorials/arduino-and-7-segment-led.html
- // License: http://www.opensource.org/licenses/mit-license.php (Go crazy)
- // Define the LED digit patters, from 0 - 9
- // Note that these patterns are for common cathode displays
- // For common anode displays, change the 1's to 0's and 0's to 1's
- // 1 = LED on, 0 = LED off, in this order:
- // Arduino pin: 2,3,4,5,6,7,8
- byte seven_seg_digits[10][7] = { { 0,0,0,0,0,0,1 }, // = 0
- { 1,0,0,1,1,1,1 }, // = 1
- { 0,0,1,0,0,1,0 }, // = 2
- { 0,0,0,0,1,1,0 }, // = 3
- { 1,0,0,1,1,0,0 }, // = 4
- { 0,1,0,0,1,0,0 }, // = 5
- { 0,1,0,0,0,0,0 }, // = 6
- { 0,0,0,1,1,1,1 }, // = 7
- { 0,0,0,0,0,0,0 }, // = 8
- { 0,0,0,1,1,0,0 } // = 9
- };
- void setup() {
- pinMode(2, OUTPUT);
- pinMode(3, OUTPUT);
- pinMode(4, OUTPUT);
- pinMode(5, OUTPUT);
- pinMode(6, OUTPUT);
- pinMode(7, OUTPUT);
- pinMode(8, OUTPUT);
- pinMode(9, OUTPUT);
- writeDot(0); // start with the "dot" off
- }
- void writeDot(byte dot) {
- digitalWrite(9, dot);
- }
- void sevenSegWrite(byte digit) {
- byte pin = 2;
- for (byte segCount = 0; segCount < 7; ++segCount) {
- digitalWrite(pin, seven_seg_digits[digit][segCount]);
- ++pin;
- }
- }
- void loop() {
- for (byte count = 10; count > 0; --count) {
- delay(1000);
- sevenSegWrite(count - 1);
- }
- delay(4000);
- }
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