Description

Three chainable 8x8 LED matrix modules, one each in red, green and blue, with colour-matched 3D-printed cases. For scrolling text, simple games and status displays.

Highlights

• One colour each. Red, green and blue modules, 64 LEDs apiece; each module is a single fixed colour, not RGB.
• Three signal wires. The MAX7219 driver takes DIN, CLK and CS, plus power.
• Chainable. DOUT feeds the next module's DIN, so three make a 24x8 display. Soldering headers is required to link them.
• Adjustable brightness. 16 brightness levels set in code, plus a low-power shutdown mode.
• Cases included. Each module gets a colour-matched 3D-printed PLA case, so no bare PCB shows.

In the box

• 3 × chainable 8x8 MAX7219 LED matrix module, one each in red, green and blue
• 3 × 3D-printed case, colour-matched
• 3 × 6-way female header socket
• 1 × long male pin header strip

Specifications

• Display: 8x8 (64 LEDs) per module
• Driver: MAX7219
• Supply: 5V
• Interface: SPI: DIN, CLK, CS, plus DOUT for chaining
• Module size: 3.2 × 3.2 × 1 cm

Works with

Programmable from the Arduino IDE, MicroPython and CircuitPython on any board with SPI. Sample code is on the Lonely Binary GitHub.