Wrist
About the Wrist PCB
Wrist is an open source PCB design by jeffc, published on GitHub. It is a 2-layer board measuring 36 × 7 mm, with 6 components from 6 distinct parts.
Other key parts include the SX9500IULTRT. By type, the board carries 2 resistors, 1 IC, 1 transistor, 1 connector and 1 diode.
It belongs with the wearables, power & battery and displays & leds designs in this gallery.
From the project
obsolete repository - see https://github.com/jeffc/nrf52-watch-firmware
This repo is, at present, a work-in-progress playground for designing and building a smartwatch based on the nrf52840 microcontroller from Nordic.
RayTac MDBT50Q nRF52840 Module Main brains. nRF52840 chipset chosen for BLE capability and low (<1uA) sleep current. This is the module used in the Sparkfun Breakout Sharp LS018B7DH02 1.8" Memory LCD with FLExLight Frontlight Always-on display. Chosen for size and small power consumption. The LS018B7DH02 isn't sold directly by Sharp, and no datasheet is currently available. Unknowns are currently Does the display require 3.3V or 5V power? Does…
Main components on the Wrist
Wrist bill of materials (BOM)
6 components, 6 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SX9500IULTRT | QFN40P300X300X60-21N | IC1 |
| 1 | Q_NMOS_GSD | SOT-323_SC-70 | Q1 |
| 1 | 5034800800 | MOLEX_5034800800 | J1 |
| 1 | LED | XM-L2 | D1 |
| 1 | 100K | R_0603_1608Metric | R1 |
| 1 | 3 ohm | R_2512_6332Metric | R2 |
Wrist design files
The KiCad project lives in the jeffc/nrf52-watch-obsolete repository on GitHub; these links point at the commit this page was built from.
Wrist: common questions
How big is the Wrist PCB?
The Wrist measures 36 × 7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Wrist?
6 components, from 6 distinct parts. The full bill of materials is listed on this page.
Where can I download the Wrist design files?
From the jeffc/nrf52-watch-obsolete repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Wrist design in my own project?
The repository has no license, so all rights stay with jeffc. Use it as a reference, and ask the author before reusing the design.
More boards in nrf52-watch-obsolete
Nordic nRFMk2
23.5 × 37.5 mm49 parts2LNo license6
Watch
41 × 23 mm42 parts2LNo license6
Watch old
35.6 × 25.4 mm38 parts2LNo license6
Panel
25.4 × 25.4 mm35 parts2LNo license6
Watch logic
25.4 × 25.4 mm27 parts2LNo license6
Watch power
25.4 × 16.3 mm17 parts2LNo license6
Flex
33.6 × 41.5 mm8 parts2LNo license6
Dock
34 × 17 mm4 parts2LNo license6
Backplate
28 × 35 mm3 parts2LNo license6
Tinysimpleled
13 × 6 mm3 parts2LNo license6
Similar boards
BM28B0.6-24DSBreakout
scottbez1
15.2 × 35.6 mm3 parts2LApache-2.022.2k
LevelShifterBreakout
15.2 × 20.3 mm5 parts2LApache-2.022.2k
View base
81.2 × 81.2 mm81 parts2LApache-2.022.2k
View screen
35 × 35 mm12 parts2LApache-2.022.2k
Display eval
byrantech
52.1 × 22.6 mm12 parts4LMIT4.3k
ChainlinkBase
98.4 × 190.5 mm119 parts2LApache-2.04.2k