74HC165N shift register with Arduino

Forum 2005-2010 (read only) Hardware Interfacing
#1

Okay, I want to be able to control the 74HC165N shift register with my arduino (I just want to send LOW, HIGH commands to each of the 8 outputs to power LED's), but I am having some trouble looking for a solution online. How would I program this/wire it up? I'm all very new to this, and any help would be greatly appreciated.

Thanks! ;D

#2

Your right to use a shift register but you need one that goes the other direction like the 74HC595. http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=MM74HC595N-ND

#3

Are you sure that those will work? I will order them tonight, and do you have possibly a sparkfun link? Thanks!

#4

Absolutely, I just used some to control a multiplexed 7seg 5 digit led module. As long as you don't need more than 35ma per pin which is plenty for 1 led each.

Also look at www.jameco.com because they are probably only 35cents there but the shipping is higher.

#5

Thanks man! I just ordered some. Also, do you think you could send me your code if you are using arduino? Would be INSANELY helpful. :D

#6

This is the Sparkfun link but they are a little steep for individual components like that. http://www.sparkfun.com/commerce/product_info.php?products_id=733

#7

Yupp, that’s exactly what I just got. And yea I just like how fast they ship and IDK they kinda got me into all this stuff so I think they deserve business from me :sunglasses:

Could you send me some code? Please it would be so helpful, feel free to post it for others to, may help them too.

#8

This is the basic function. If you chain more together you just send multiple bytes then latch at the end. You simply tie the pin 9 output of one to the SER of the next one and link all the RCK and SCK lines together.

//SCLR pin 10-high
//G pin 13-low

int SER=8;//data pin
int SCK=9;//clock pin
int RCK=10;//latch pin

void setup(){
  pinMode(SER,OUTPUT);
  pinMode(RCK,OUTPUT);
  pinMode(SCK,OUTPUT);
  digitalWrite(RCK,HIGH);
  digitalWrite(SER,LOW);
  digitalWrite(SCK,LOW);

}

void loop(){
 setByte(255);
 latchData();
 delay(1000);
 setByte(0);
 latchData();
 delay(1000);
  
}

void setByte(int _value){
  for(int i=7;i>=0;i--){
    digitalWrite(SER,((_value>>i)&1));
    digitalWrite(SCK, HIGH);
    digitalWrite(SCK, LOW);
  }
}

void latchData(){
 digitalWrite(RCK, LOW); 
 digitalWrite(RCK, HIGH); 
}

Also if you use the G enable on a PWM pin then you can control brightness.

#9

There's a good tutorial in the EarthshineDesign ASK manual with the 595's. (along with a bunch of others)

http://earthshinedesign.co.uk/ASKManual/ASKManual.pdf

I suggest you save it to your hard drive, if you were like me when you were starting, you'll read it like a Bible for the first couple weeks. :)

#10

There is also a tutorial on arduino.cc:

http://arduino.cc/en/Tutorial/ShiftOut

#11