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The TK33 at an angle: a small black board with a gold border, five square white LEDs in a column along its right side, four right-angle header pins sticking out of the left edge beside GND, VCC, NC and DATA, lonely binary in gold, and two round LEGO holes on the left, one near each end.
VR

View it in VR

This board opens in a VR headset: life-size, or big enough to stand beside, with every pin and every part named where it sits. Open this address in the browser on a headset such as Apple Vision Pro or Meta Quest.

learn.lonelybinary.com/vr/tk33
You have this

WS2812 RGB LED Bar

Five addressable RGB LEDs on one data wire. VCC wants 5 V, each colour runs at 12 mA, the LEDs read green first, and the chain ends at the fifth LED.

LEDs
5on one data wire
VCC
3.5 to 5.5V, the 5V pin
Full white
182mA, all five
Data HIGH
0.7× VCC at least
Start here · 01 One wire, five LEDsOpen the board in 3D

Every pin and part: the five LEDs and the data chain from the top one to the bottom, the NC pin that goes nowhere, and LED5's output that reaches no pin.

Product questions & answers ↓

The whole handbook9 articles · 45 minQuick referencePDF · 428 KBModel (GLB)GLB · 1.2 MBCAD (STEP)ZIP · 499 KBWS2812B LED datasheetPDF · datasheet.lcsc.comPinout and specsThe pin table, and the questions people ask first
Community

Product questions

See what other owners have asked, and read their solutions.

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WS2812 RGB LED Bar

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Need another

Not on general sale yet. Reply to your order and we will sort out a spare — quote tk33.

Order or missing parts?

Email us or reply to your order, and quote tk33 — that identifies the product. If something is missing from the bag, your order is the record of what shipped.

Take it with you

Point a phone camera at the code and this page opens there. It is the same address as the one printed on your box, so it is also what to show someone you are passing the board to.