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.
Step 1: 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.