Hardware Details

The board is 64 WS2812B LEDs and little else. Each WS2812B has its own control circuit and RGB chip in one 5050 package: it keeps the first 24 bits of colour data it receives and passes the rest on, reshaped, to the next LED. That is why one data line drives the whole grid.

• LEDs: 64 WS2812B in 8 rows of 8, 10 mm apart, each with its own 100 nF decoupling capacitor.
• Data path: DIN reaches the first LED, at the top left, through a 100 Ω series resistor. The data then runs in a serpentine, the first row left to right, the next right to left, and so on down the grid, and leaves the last LED on DOUT.
• Power: VCC goes straight to every LED. There is no regulator and no level shifter on the board.

Key specifications

Specification	Value
Interface
Interface	Single-wire digital data: DIN in, DOUT out
Data rate	800 kbps, 24 bits per LED, green-red-blue order
Qwiic compatible	No
Breadboard compatible	Yes, header pins included (unsoldered)
Power
Supply voltage	5 V on VCC, 4.5 V to 5.3 V
Logic level	5 V only; DIN high from 0.7 x VCC, low up to 0.3 x VCC
Operating current	3840 mA (no conditions stated)
Other
LED IC	WS2812B (5050 package), 64 pieces
Layout	8 x 8, 10 mm pitch
Colour depth	256 levels per colour, 16777216 colours
Data input	100 Ω series resistor on DIN
Decoupling	100 nF per LED
Dimensions	80 x 80 mm
Mounting holes	4 x 3.2 mm

Pinout

Soldered Smart LED WS2812B Grid 8x8 pinout

Pin marking	Pin name	Description
DIN	Data in	Data from your controller to the first LED, through the 100 Ω series resistor.
GND	Ground	Common ground for power and data.
VCC	5 V supply	Powers every LED directly, 4.5 V to 5.3 V.
DOUT	Data out	Data out of the last LED. Connect it to DIN of the next grid to chain grids.
Edge pads	VCC, GND, DIN or DOUT	Solder pads on every edge that line up with the neighbouring grid, for joining grids into a panel.

To build a panel from several grids, connect DOUT of one grid to DIN of the next. The libraries number the grids column first: all grids of the first column from top to bottom, then the next column. Connect DOUT of the last grid in each column to DIN of the first grid in the next column.

Each grid powers its LEDs only from its own VCC, so the data link alone is not enough. Join VCC and GND between the grids too, with the edge pads or with wires, so that every grid gets 5 V and shares its ground with the data line.

Voltage and logic levels

Connection	Supported voltage	Notes
VCC	5 V (4.5 V to 5.3 V)	Feeds all 64 LEDs directly. 5.3 V is the WS2812B's absolute maximum supply.
DIN	5 V logic	High from 0.7 x VCC, which is 3.5 V at a 5 V supply; low up to 0.3 x VCC. No level shifter on the board.

Keep VCC at or below 5.3 V, the WS2812B's absolute maximum. A 3.3 V data signal is below the 3.5 V the LEDs need to read a high at a 5 V supply, so the grid is specified for a 5 V logic signal on DIN.

The library examples set the brightness to 40 out of 255 and say to keep it low to avoid excessive current draw.

Running the SetPixel example, the grid draws an estimated 80 mA from 5 V. This is a calculation, not a measurement. It takes the 3840 mA operating current as all 64 LEDs at full white: 60 mA per LED, or 20 mA per colour at 255. SetPixel lights nine colour channels at 40 out of 255 (one each for the red, green and blue pixels, three for each of the two white pixels), about 28 mA. For the LEDs' own idle draw it assumes about 0.6 mA per LED, which adds about 38 mA; the datasheet gives no idle figure, so this part is our assumption. That makes about 66 mA, and about 20 % on top for calculation error gives about 80 mA.

Dimensions

The board measures 80 x 80 mm. The LEDs sit 10 mm apart, and the centres of the outer LEDs are 5 mm from the board edges. Four mounting holes, each 3.2 mm in diameter, let you screw the board down. Their centres form a 48 x 40 mm rectangle centred on the board: 48 mm apart along the LED rows and 40 mm apart along the columns.

Jumpers

The board has no configuration solder jumpers. The three-pad groups on the edges are the chaining pads described under Pinout.