Instructables

LED Matrix with Arduino

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Hola , I am Javier from Makespace Madrid. Last week we organised a meetup to play with LED matrixes and Arduinos. This was part of  "La noche de la electrónica con Jameco"
This instructable is based on the workshop. It uses one single LED matrix and shows how to switch its LEDs on/off and how to display ASCII characters.
A future instructable will show how to work with mulitple LED matrixes connected together.
 
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Step 1: Components

Picture of Components
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For this example, you need the following components:
- Arduino Uno board
- MAX7219 Red Dot Matrix Module
- 5 jumper wires F/M (female/male)

Although this instructable uses an Arduino Uno board, you can use other Arduino (compatible) boards

You can find the matrix module at many online stores (e.g. http://dx.com/p/max7219-dot-matrix-module-w-5-dupont-lines-184854). This includes a 8x8 LED matrix (red colour), a MAX7219 chip to control the LEDs, header PINs and sockets, one 10KOhm resistor, a 100nF capacitor, a 10uF electrolic capacitor and a PCB where everything is connected together. You can purchase the module already soldered and mounted or just the components. Up to you;-)

If you want to learn the low level details, you should check this article at arduino playground.

IMPORTANT: The LED matrix is common cathode. This module does not work with common anode matrixes.
judas7914 days ago

Does the arduino have to have a UNO bootloader on it for the Matrix fo function? I've tried this code with the libraries, on a Leonardo and a mini pro and all I get is; almost all the leds constantly being on not even a blink.

Thank-you SO much — this has been my first successful Arduino ‘anything’!!

tumaku (author)  CraigMarston1 month ago

Thanks for trying it out!

Hope this is just the first one of a looong list of Arduino projects :-)

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