# Adafruit NeoPixel Ring 12 (#1643): Ø36.83 × Ø23.37 mm ring and LED positions

> What are the Adafruit NeoPixel Ring 12 (product 1643) dimensions and LED positions?

- Category: Electronic components › Switches, relays & indicators
- Kind: Modern device
- Basis: Adafruit's EagleCAD board file for the NeoPixel Ring 12 and the NeoPixel Überguide ring page (3.6 mm total thickness).
- Page: https://xemstudio.com/objects/adafruit-neopixel-ring-12-1643/ · JSON: https://xemstudio.com/api/geometry?object=adafruit-neopixel-ring-12-1643 · Plain text: https://xemstudio.com/objects/adafruit-neopixel-ring-12-1643/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 36.83 | 36.83 | 3.6 |

**Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part.

## Notes

- Flat ring PCB: outer Ø36.830, bore Ø23.368, centred, board bottom at 0, LEDs facing up. Board thickness 1.6 is taken from Adafruit's Überguide note (1.6 PCB + 2 mm LEDs) and is not stated in the board file.
- 12 WS2812B LEDs, 5.0 × 5.0, standing 2.0 above the board (top at 3.6), centred on a Ø29.464 circle every 30°, LED 1 at (0, +14.732).
- No mounting holes: hold the ring by its outer edge, its bore or its back face.
- Not modelled: the wire/solder pads on the back and the breakaway-tab stubs on the rim.
- All dimensions are exact nominal millimetres, true size, with no tolerance added.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| Outer edge | Ø36.830 × 1.6 | pocket, lip or edge clips in a housing | designed | all |
| Bore | Ø23.368 | centring boss or hub through the ring | designed | all |
| LED circle | 12 × 5.0 × 5.0 on Ø29.464, top 3.6 | diffuser or light-pipe ring | designed | all |

## Where the files are

- Adafruit: [NeoPixel Ring - 12 x 5050 RGB LED with Integrated Drivers (#1643)](https://www.adafruit.com/product/1643) — web — Publisher's page; dimensions are facts
- Adafruit: [Adafruit-NeoPixel-Ring repository](https://github.com/adafruit/Adafruit-NeoPixel-Ring) — web — Publisher's page; dimensions are facts
- Adafruit Learning System: [Adafruit NeoPixel Überguide: NeoPixel Rings](https://learn.adafruit.com/adafruit-neopixel-uberguide/neopixel-rings) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/adafruit-neopixel-ring-12-1643/index.json

- adafruit-neopixel-ring-12-1643: [STEP](https://xemstudio.com/files/hardware/adafruit-neopixel-ring-12-1643/adafruit-neopixel-ring-12-1643.step) · [STL](https://xemstudio.com/files/hardware/adafruit-neopixel-ring-12-1643/adafruit-neopixel-ring-12-1643.stl) — Adafruit NeoPixel Ring 12 (#1643): Ø36.83 × Ø23.37 mm ring and LED positions

## Questions

**What size is the NeoPixel Ring 12?**

Outer Ø36.83 mm, inner Ø23.37 mm, 3.6 mm thick (1.6 mm board plus 2.0 mm LEDs).

**Where are the LEDs on the 12 ring?**

12 LEDs, 5.0 × 5.0 mm, on a Ø29.46 mm circle, one every 30°.

**Does the NeoPixel Ring 12 have mounting holes?**

No. Mount it by the outer edge, the bore or the back face.

## Fits with

- [NeoPixel rings, sticks, jewel, matrices and RGB LED matrix panels](https://xemstudio.com/objects/adafruit-neopixel-rings-matrices/)
- [Adafruit Feather boards and FeatherWings](https://xemstudio.com/objects/adafruit-feather-boards/)
- [Adafruit QT Py, ItsyBitsy, Trinket, GEMMA and Trinkey boards](https://xemstudio.com/objects/adafruit-qt-py-itsybitsy-trinket/)
- [Adafruit Metro Mini 328](https://xemstudio.com/objects/adafruit-metro-mini-328/)
- [USB-C / micro-USB breakouts, panel-mount USB, DC jack, magnetic connectors, microSD breakout, Perma-Proto and breadboards](https://xemstudio.com/objects/adafruit-breakouts-cables-proto/)