[SOLVED] SHIFTOUT not working

***moderator please mark solved or delete. figured out defective breadboard.

running following example code. cannot leds light unless put in 1 of leds backwards. others work plus backwards 1 stays on. please help.

code: [select]

//pin connected st_cp of 74hc595
int latchpin = 8;
//pin connected sh_cp of 74hc595
int clockpin = 12;
////pin connected ds of 74hc595
int datapin = 11;



void setup() {
  //set pins output can control shift register
  pinmode(latchpin, output);
  pinmode(clockpin, output);
  pinmode(datapin, output);
}

void loop() {
  // count 0 255 , display number
  // on leds
  for (int numbertodisplay = 0; numbertodisplay < 256; numbertodisplay++) {
    // take latchpin low
    // leds don't change while you're sending in bits:
    digitalwrite(latchpin, low);
    // shift out bits:
    shiftout(datapin, clockpin, msbfirst, numbertodisplay);  

    //take latch pin high leds light up:
    digitalwrite(latchpin, high);
    // pause before next value:
    delay(500);
  }
}


quote from: smarcus3 on nov 03, 2015, 02:55 am

***moderator please mark solved or delete

you can things yourself. there "more..." menu under post.

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