/
counter_dec.ino
81 lines (67 loc) · 1.48 KB
/
counter_dec.ino
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/*
Simple example of how to use the multiplexed 7-segment display with decoder
*/
//pins
#define A 2
#define B 3
#define C 4
#define D 5
#define D1 6
#define D2 7
#define D3 8
#define D4 9
void setup() {
pinMode(A, OUTPUT);
pinMode(B, OUTPUT);
pinMode(C, OUTPUT);
pinMode(D, OUTPUT);
pinMode(D1, OUTPUT);
pinMode(D2, OUTPUT);
pinMode(D3, OUTPUT);
pinMode(D4, OUTPUT);
digitalWrite(D1, LOW);
digitalWrite(D2, LOW);
digitalWrite(D3, LOW);
digitalWrite(D4, LOW);
}
int value;
unsigned char digit;
void loop() {
value = analogRead(A0);
//one thousands
digit = (value / 1000) % 10;
digitalWrite(A, digit & 0x01);
digitalWrite(B, digit & 0x02);
digitalWrite(C, digit & 0x04);
digitalWrite(D, digit & 0x08);
digitalWrite(D1, HIGH);
delay(5);
digitalWrite(D1, LOW);
//hundreds
digit = (value / 100) % 10;
digitalWrite(A, digit & 0x01);
digitalWrite(B, digit & 0x02);
digitalWrite(C, digit & 0x04);
digitalWrite(D, digit & 0x08);
digitalWrite(D2, HIGH);
delay(5);
digitalWrite(D2, LOW);
//tens
digit = (value / 10) % 10;
digitalWrite(A, digit & 0x01);
digitalWrite(B, digit & 0x02);
digitalWrite(C, digit & 0x04);
digitalWrite(D, digit & 0x08);
digitalWrite(D3, HIGH);
delay(5);
digitalWrite(D3, LOW);
//ones
digit = value % 10;
digitalWrite(A, digit & 0x01);
digitalWrite(B, digit & 0x02);
digitalWrite(C, digit & 0x04);
digitalWrite(D, digit & 0x08);
digitalWrite(D4, HIGH);
delay(5);
digitalWrite(D4, LOW);
}