Scrolling text ticker
Drive the 8x8 grid as a marquee that scrolls messages, clocks, or notifications one column at a time.
WS2812B RGB Matrix 8×8
An 8x8 grid of 64 chainable WS2812B RGB LEDs, each with a built-in controller, driven over a single 5V data wire.
What is the WS2812B RGB Matrix 8×8?
The WS2812B 8x8 matrix packs 64 individually addressable RGB LEDs into a 65 x 65 mm board. Each pixel is a 5050-package WS2812B that combines a red, green, and blue die with an integrated control IC, so the whole panel is driven from one microcontroller pin instead of 192 separate connections. Every LED runs 8-bit PWM per color channel, giving 256 brightness levels per channel and roughly 16.7 million possible colors per pixel.
The 64 pixels are wired as a single cascade. Data enters at DIN, each pixel latches the first 24 bits (in GRB order) as its own color, then reshapes and forwards the remaining bits out of DOUT to the next pixel. Communication uses a single-wire, self-clocking NRZ protocol at 800 Kbps, where a 0 and a 1 are distinguished by how long the line stays high inside each roughly 1.25 us bit. Holding the data line low for longer than the reset time (greater than 50 us) latches the frame and makes all pixels display their loaded values at once.
The panel runs on 5V (the WS2812B operates from about 3.5V to 5.3V). Each pixel can draw close to 60 mA at full white, so all 64 lit at maximum white can pull nearly 3.8A, far more than an Arduino 5V pin can source. Because the data-line logic-high threshold is about 0.7 x VDD (roughly 3.5V at a 5V supply), a 3.3V microcontroller output sits near or below that threshold and usually needs a level shifter for reliable color.
WS2812B RGB Matrix 8×8 pinout
| Pin | Function | Type |
|---|---|---|
VCC +5V | Power | Power in |
GND GND | Power | Power in |
DIN DIN | Digital · 1-Wire WS2812 | Digital input |
DOUT DOUT | Digital · 1-Wire WS2812 | Free |
Specifications
- Operating voltage
- 5 V (max 5.5 V)
- Interface
- 1-Wire
- Dimensions
- 65 × 3 × 65 mm
Verified from the Tinkered component library · CJMCU / Generic.
Circuit requirements
- Power the matrix from a dedicated 5V supply sized for the load: 64 pixels at full white approach 3.8A, so budget accordingly rather than powering it from the Arduino 5V pin.
- Tie the matrix ground to the microcontroller ground. The data signal is referenced to a shared GND, and a floating ground causes erratic colors or no output.
- Respect the data-direction arrow: the driving signal must connect to DIN. DOUT only feeds the next pixel or the next panel in a chain.
- Add a large bulk capacitor (about 1000 uF, 6.3V or higher) across 5V and GND at the panel input to absorb inrush current and protect the first pixel.
- Place a 300-500 ohm resistor in series with the data line close to DIN to damp reflections and reduce the risk of damaging the first pixel's data input.
- Level-shift the data line from 3.3V logic (ESP32, Raspberry Pi, most STM32) up to 5V, since the WS2812B data-high threshold is about 0.7 x VDD (roughly 3.5V at a 5V rail).
Board compatibility
The WS2812B RGB Matrix 8×8 connects to any of the microcontrollers supported in Tinkered. Mind the 5 V logic level on 3.3 V boards.
Common WS2812B RGB Matrix 8×8 mistakes
Wiring the signal into DOUT
Data only flows one direction, from DIN to DOUT. Connecting the microcontroller to DOUT, or chaining a second panel backward, leaves the matrix dark. Follow the on-board arrow and drive DIN.
Skipping the level shifter on 3.3V boards
At a 5V supply the data-high threshold is about 3.5V, so a 3.3V pin is marginal. It may work on the bench and then flicker, glitch, or show wrong colors. Use a level shifter (or power the panel at a slightly lower 5V) for reliable output from ESP32, Pi, or STM32.
Underpowering the panel
All 64 pixels at full white draw close to 3.8A. Running that through the Arduino 5V pin or thin jumper wires causes brownouts, dimming, and color shifts. Use a proper 5V supply and cap software brightness if the supply is small.
Wrong color order in code
WS2812B latches data in GRB order, not RGB. Initializing the library with the wrong order swaps red and green. Set the strip type to GRB (the default in most NeoPixel libraries) so colors match what you request.
No bulk capacitor or series resistor
Omitting the input capacitor and the data-line resistor leaves the first pixel exposed to inrush current and voltage spikes at power-up, which can kill it and break the whole chain downstream. Add both at the panel input.
WS2812B RGB Matrix 8×8 datasheet
Official WS2812B RGB Matrix 8×8 datasheetCJMCU / Generic
Popular WS2812B RGB Matrix 8×8 projects
Pixel art and animations
Map 8x8 bitmaps to the 64 pixels for icons, emoji, and looping animations, a natural fit for the single-wire frame update.
Audio spectrum / VU meter
Feed FFT or level data to the columns for a reactive sound visualizer that lights up with music.
Games on a grid
Build Snake, Tetris, or Conway's Game of Life where the 8x8 matrix is the playfield and each pixel is a cell.
Ambient status display
Show weather, CPU load, or notification colors at a glance using per-pixel brightness and color mixing.
More leds & addressable
Build with the WS2812B RGB Matrix 8×8.
Drop the WS2812B RGB Matrix 8×8 into a circuit, write firmware, and simulate it in your browser, then deploy to real hardware. All in one editable Tinkered project.