101 - Arduino LED Matrix

101 - Arduino LED Matrix

This is a redevelopment of previous Arduino LED matrix workshops, including Deskduino and Badgeduino.

Michelle Brown and Peter Lin, September 2022.

Acknowledgement

We acknowledge Aboriginal and Torres Strait Islander peoples and their continuing connection to land and as custodians of stories for millennia. We respectfully acknowledge the land on which we all meet today, and pay our respects to elders past, present and emerging.

Summary

Participants will learn about the Arduino IDE program and connecting an Arduino Nano and a programmable 8×8 LED Matrix display.

Skills Introduced

  • Overview of circuit and components
  • Assembling components
  • Using the Arduino IDE and basic coding

Materials

Material Quantity Cost
Arduino Nano V3.0 Board 10 $13.48
USB cable (included with Nano) 10 $0.00
MAX7219 Serial Dot Matrix Display Module 10 $9.05
Solderless Breadboard 10 $4.36
Solderless Breadboard Jumper Cable Wires (10 x 10) 50 $0.80
Total $27.69

Requirements

  • Computer with USB A port or adaptor
  • Arduino IDE program installed

Health & Safety

Running this workshop at The Edge?.. You should familiarise yourself and your participants with:

  • DML Risk Assessment

Workshop Walk through

What is a microcontroller?

A microcontroller (or MCU for microcontroller unit) is a small computer on a single integrated circuit.

  • one or more CPUs (processor cores)
  • memory
  • programmable input/output peripherals
  • can be mixed signal devices interacting with
    • digital signals
    • analogue signals

Why use an MCU?

Microcontrollers are small, low powered and robust, making them perfect for embedded systems such as:

  • medical devices
  • remote controls
  • office machines
  • appliances
  • power tools
  • toys
  • wearable technology

What is Arduino?

Arduino is an open source computer hardware and software organisation, project, and user community 1)

  • The hardware is based on the Amtel 8-bit AVR MCU
  • The software uses the Processing IDE, with a simplified version of the Java programming language
  • Open source has led to the creation of a huge range of
    • clones
    • compatible devices
    • peripherals
  • A strong community means
    • “Someone, Somewhere has solved the problem”
    • we can run this workshop using and adapting existing resources.

Basic circuitry

Example diagram

Step 1

Downloading or checking our software is installed and up to date. We an install updates to our software on the DML (Digital Media Lab) computers, it just won't save the update when the computers are restarted.

Arduino IDE

Open Arduino IDE, it will automatically open a blank code base document for you.

Connect the Arduino Nano with the blue USB cable provided.

arduino101_4.jpg

Do a Blink test by navigating to the File menu>Examples>0.1 Basics>Blink

Step 2

Components

What are breadboards?

A breadboard (sometimes called a plugblock) is used for building temporary circuits. It is useful to designers because it allows components to be removed and replaced easily.

What connectors and cables do we use for basic electronics?

In this workshop we are using Solderless Breadboard Jumper Cable Wires so we don't have to do any soldering.

Connecting cables, what you need to know (pins, ground etc).

Let's put our kit together (explain which cable goes where and how we need to know this for the programming)

Nano Pin
TX1.
RX0
RST
GND
D2
D3
D4
D5
D6
D7
D8
D9
D10 CS Load
D11 CLK
D12 DIN Data in
- - -
D13
303
REF
AV
A1
A2
A3
A4
A5
A6
A/
5V VCC 5 volts
RST
GND GND Ground
VIN

Step 3

Downloading and adding libraries

For this we need LedControl library, so let's learn how to add a library.

Install LedControl Library

and can use the example “LCDemoMatrix.ino” to test our devices are working

Run Example Code

This should have our matrix working! If not, let's troubleshoot.

If you did get it working, try some of the other example library code.

References

Downloads

Additional Learning

Take a look at our Arduino 101 - Coding workshop

workshops/public/arduino101.txt · Last modified: 2024/02/15 11:47 by Michelle Brown
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We acknowledge Aboriginal and Torres Strait Islander peoples and their continuing connection to land and as custodians of stories for millennia. We are inspired by this tradition in our work to share and preserve Queensland's memory for future generations.