Published April 21, 2019 © LGPL

3 Pins, 32 LEDs, 4 Shift Registers [74HC595]

An arduiNOOB friendly tutorial for beginners on daisy-chaining.

BeginnerFull instructions provided25,139

3 Pins, 32 LEDs, 4 Shift Registers [74HC595]

Things used in this project

Hardware components

Arduino Nano R3

Texas Instruments Shift Register- Serial to Parallel

74HC595

Solderless Breadboard Full Size

LED (generic)

Depends on your preference.

Resistor 100 ohm

Depends on the LEDs.

Jumper wires (generic)

A lot.

Software apps and online services

Arduino IDE

Story

This is a step-by-step guide that I have created for beginners and arduiNOOBS like me.

In this tutorial, we would be discussing some pretty basic knowledge about the 8-bit shift register called 74HC595.

Learn how to daisy-chain them together and use some codes from an HC595 Library.

Also, I encountered a problem with some of the shift registers. I don't know why. Was it because of lack of power?

******************************************************************************

NECESSARY LINKS:

HC595 Library - https://github.com/j-bellavance/HC595

Datasheet - http://www.ti.com/document-viewer/SN74HC595/datasheet/specifications#SCLS0419845

More Information: https://rastating.github.io/using-a-74hc595-shift-register-with-an-arduino-uno/

For Loop Iteration: https://www.arduino.cc/en/Tutorial/ForLoopIteration

******************************************************************************

Social Media Links To Follow (I mean, if you want to):

Facebook - https://fb.me/HeathenHacks

Twitter - https://twitter.com/HeathenHacks

Instagram - https://instagr.am/HeathenHacks

******************************************************************************

Diagram

It was a huge oversight on my part.

Initial Testing/Basic Setup

Before Wiring the LEDs.

Messy Wiring

LEDs

I encountered some odd problem with the shift registers with this particular number. "13CNONKE4".

Video Is Up!

CLICK HERE FOR THE BONUS LIGHT SHOW VIDEO! EDITED THE VIDEO IN PREMIERE, BECAUSE IT LOOKS PRETTY.

https://youtube.com/@HeathenHacks

Code

Edited Sample Code From The HC595 Library.

#include <HC595.h>

const int chipCount = 2;  // Number of serialy connected 74HC595 (8 maximum)
const int latchPin = 4;  // Pin ST_CP (12) of the 74HC595
const int clockPin = 3;  // Pin SH_CP (11) of the 74HC595
const int dataPin = 2;   // Pin DS (14) of the 74HC595

//Constructor
HC595 ledArray(chipCount,latchPin,clockPin,dataPin);

int delayMs = 30;
int lastPin = ledArray.lastPin();

void setup() {
  ledArray.reset();
}

void loop() {
  for (int i = 0 ; i <= lastPin ; i++) {
    ledArray.setPin(i, ON);
    delay(delayMs);
  }
  for (int i = lastPin ; i >= 0 ; i--) {
    ledArray.setPin(i, OFF);
    delay(delayMs);
  }
  for (int i = lastPin ; i >= 0 ; i--) {
    ledArray.setPin(i, TOGGLE);
    delay(delayMs);
  }
  for (int i = 0 ; i <= lastPin ; i++) {
    ledArray.setPin(i, TOGGLE);
    delay(delayMs);
  }
}

Credits

HeathenHacks

24 projects • 57 followers

I don't know what I'm doing here.

3 Pins, 32 LEDs, 4 Shift Registers [74HC595]

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Daisy-chained. Schematic.

Code

Edited Sample Code From The HC595 Library.

HC595 Library by Mr. J. Bellavance

Credits

HeathenHacks

Comments

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3 Pins, 32 LEDs, 4 Shift Registers [74HC595]

3 Pins, 32 LEDs, 4 Shift Registers [74HC595]

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Daisy-chained. Schematic.

Code

Edited Sample Code From The HC595 Library.

HC595 Library by Mr. J. Bellavance

Credits

HeathenHacks

Comments

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