int dataPin = 9; // SER
int clockPin = 8; // SRCLK
int latchPin = 4; // RCLK
void setup() {
pinMode(dataPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(latchPin, OUTPUT);
}
void loop() {
// All LEDs ON
digitalWrite(latchPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, 255); // 11111111
digitalWrite(latchPin, HIGH);
delay(1000);
// All LEDs OFF
digitalWrite(latchPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, 0); // 00000000
digitalWrite(latchPin, HIGH);
delay(1000);
}
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