# Particle Photon 2 — Feather-size board outline and 4 × Ø2.54 mounting holes

> What are the Particle Photon 2 dimensions and mounting-hole positions?

- Category: Electronic components › Microcontroller boards
- Kind: Modern device
- Basis: Particle Photon 2 datasheet, Mechanical specifications, recommended PCB land pattern figure.
- Page: https://xemstudio.com/objects/particle-photon-2/ · JSON: https://xemstudio.com/api/geometry?object=particle-photon-2 · Plain text: https://xemstudio.com/objects/particle-photon-2/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 |
|---|---|---|
| 50.8 | 22.86 | 1.6 |

**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

- Exact nominal dimensions. PCB 22.86 × 50.80 mm (0.9 × 2.0 in), 1.6 mm; datum is the board centre, bottom on z=0.
- Four mounting holes Ø2.54 (0.1 in) at (±8.89, ±22.86): a 17.78 × 45.72 mm (0.7 × 1.8 in) pattern, 2.54 mm in from every edge.
- Header rows: two single rows of 2.54 mm pitch along the long edges, 20.32 mm (0.8 in) apart, 16 pins on one side and 12 on the other.
- Modelled: outline and holes. Not modelled: header pins, radio module, USB connector and U.FL connector (not dimensioned on the datasheet); corners modelled square.

## 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 |
|---|---|---|---|---|
| mounting holes | 4 × Ø2.54 on 17.78 × 45.72; PCB 22.86 × 50.80 | M2 or M2.5 screws or standoffs; Adafruit Feather hole pattern | designed | all |
| header rows | 1 × 16 and 1 × 12, 2.54 pitch, rows 20.32 apart | 2.54 mm female headers or FeatherWing sockets | designed | all |

## Sizes

| hole | x mm | y mm | diameter mm |
|---|---|---|---|
| 1 | -8.89 | -22.86 | 2.54 |
| 2 | 8.89 | -22.86 | 2.54 |
| 3 | -8.89 | 22.86 | 2.54 |
| 4 | 8.89 | 22.86 | 2.54 |

## Where the files are

- Particle: [Photon 2 datasheet — mechanical specifications](https://docs.particle.io/reference/datasheets/wi-fi/photon-2-datasheet/) — web — Publisher's page; dimensions are facts
- Particle (GitHub): [particle-iot hardware-libraries](https://github.com/particle-iot/hardware-libraries) — web — Publisher's page; dimensions are facts

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

Index: https://xemstudio.com/files/hardware/particle-photon-2/index.json

- particle-photon-2: [STEP](https://xemstudio.com/files/hardware/particle-photon-2/particle-photon-2.step) · [STL](https://xemstudio.com/files/hardware/particle-photon-2/particle-photon-2.stl) — Particle Photon 2 — Feather-size board outline and 4 × Ø2.54 mounting holes

## Questions

**How big is the Particle Photon 2?**

22.86 × 50.80 mm (0.9 × 2.0 in), the Adafruit Feather size.

**What is the Photon 2 mounting-hole pattern?**

Four Ø2.54 mm holes on a 17.78 × 45.72 mm rectangle, 2.54 mm from each edge.

**How far apart are the Photon 2 header rows?**

20.32 mm (0.8 in), 2.54 mm pitch, 16 pins on one side and 12 on the other.

## Fits with

- [Adafruit Feather (standard form factor)](https://xemstudio.com/objects/adafruit-feather/)
- [Adafruit Feather boards and FeatherWings](https://xemstudio.com/objects/adafruit-feather-boards/)
- [Adafruit Feather ESP32-S3](https://xemstudio.com/objects/adafruit-feather-esp32-s3/)
- [2.54 mm pin headers, 1×2 to 2×20, vertical and right-angle](https://xemstudio.com/objects/pin-headers-2.54mm/)
- [Threaded standoffs, M2.5 and M3 (hex and round)](https://xemstudio.com/objects/threaded-standoffs-metric/)
- [U.FL (IPEX MHF1 type) connector: mated heights and cable sizes](https://xemstudio.com/objects/u-fl-connector/)