This example is for Wiring version 0027+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.
74LS595 Shift Register by BARRAGAN http://barraganstudio.com
Sends the value stored in the byte variable counter to the shift register. The shift register outputs QA to QH will reflect the value sent.
int data = 0; // Wiring pin 0 for data
int clock = 1; // Wiring pin 1 for clock
int strobe = 2; // Wiring pin 2 for the strobe (latch)
byte counter = 0;
void setup() {
pinMode(data, OUTPUT);
pinMode(clock, OUTPUT);
pinMode(strobe, OUTPUT);
}
void loop() {
digitalWrite(strobe, LOW);
shiftOut(data, clock, LSBFIRST, counter); // writes counter to the shift register
digitalWrite(strobe, HIGH);
delay(1000);
counter = counter + 1;
}