What's better than a single LED? Lots of LEDs! A fun way to make a small display is to use an 8x8 matrix or a 4-digit 7-segment display. Matrices like these are 'multiplexed' - so to control 64 LEDs you need 16 pins. That's a lot of pins, and there are driver chips like the MAX7219 that can control a matrix for you but there's a lot of wiring to set up and they take up a ton of space.
Here we feel your pain! After all, wouldn't it be awesome if you could control a matrix without tons of wiring? That's where these lovely LED matrix backpacks come in.
The matrices use a driver chip that does all the heavy lifting for you: They have a built in clock so they multiplex the display. They use constant-current drivers for ultra-bright, consistent color, 1/16 step display dimming, all via a simple I2C interface.
These 1.2" matrix backpacks come with three address-selection jumpers so you can connect up to eight 1.2" 8x8's together(or a combination, such as four 1.2" 8x8's and four 7-segments, etc) on a single I2C bus.
Features:
I2C 8x8 LED matrix, very nice with LED matrix backpacks.
They have a built in clock so they multiplex the display.
This LED matrix are very nice with good build quality and great packaging.
A fun way to make a small display is to use an 8x8 matrix or a 4-digit 7-segment display.
Matrices like these are 'multiplexed' - so to control 64 LEDs you need 16 pins.
The matrices use a driver chip that does all the heavy lifting for you.
Specifications:
Brand: Keyestudio
Model: I2C 8X8 LED Matrix HT16K33
Material:FR4
Color: Black
Working Voltage: DC 5V
Working Current: 30mA
Working Temperature: -10 ~ +50℃ / 14 ~ 122℉
IO Interface: IIC
Item Size: 4.7 * 3.2 * 1.2cm / 1.8 * 1.3 * 0.5in
Package Size: 7 * 6 * 1.4cm / 2.8 * 2.4 * 0.6in
Package Weight: Approx. 12g / 0.42oz
Package List:
1 * I2C 8X8 LED Matrix HT16K33 Module