8 layers37 × 40.5 mm
Watch main
ben5049/Smart-Watch
This project aims to take a cheap, common smart watch and upgrade it by replacing the screen and all internal electronics with custom hardware.
206 partsApache-2.0
2 layers46 × 26 mm
Module test rig
ben5049/Smart-WatchThis project aims to take a cheap, common smart watch and upgrade it by replacing the screen and all internal electronics with custom hardware.
- Size
- 46 × 26 mm
- Copper layers
- 2
- Thickness
- 1.61 mm
- Parts
- 16
- Nets
- 27
- Pads
- 75
- Tracks, vias
- 62, 10
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 11 Dec 2023
- Updated
- 17 Mar 2025
Overview
Module test rig is an open-source printed circuit board by ben5049, from the ben5049/Smart-Watch repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 46 × 26 mm with 16 parts on 27 nets, routed with 62 tracks and 10 vias.
It is built around the AMS1117-3.3 and TYPE-C-31-M-12. Its parts include 3 capacitors, 3 connectors, 2 resistors, 2 ICs and 2 switches.
Main components
2
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
TYPE-C-31-M-12
SMD-30℃~+80℃ 1 10,000 cycles 16P 20V 5A 7.35mm Female Surface Mount, Right Angle Type-C SMD USB Connectors ROHSHRO ElectronicsUSB Connectors
README
README.mdSmart-Watch
Introduction
This project aims to take a cheap, common smart watch and upgrade it by replacing the screen and all internal electronics with custom hardware.
Repository structure
- /Documentation - all the documents to do with the project, including hardware and software design, datasheets, reference manuals, images etc.
- /PCBs - KiCad projects for all the circuit boards used, libraries for all components, and old versions.
- /Firmware - code for STM32 and nRF53 microcontrollers, including drivers for most chips.
- /CAD - 3D models for components and assemblies, as well as 3D printing files.
- /Simulations - Spice simulations of certain (mainly analogue) circuits.
Parts
16| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | M3 | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad_TopBottom | H105, H106, H107, H108 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric | R101, R102 |
| 1 | 10-Pin Pogo Connector | watch_footprints:10-Pin Pogo Connector | J102 |
| 1 | 100n | Capacitor_SMD:C_0402_1005Metric | C101 |
| 1 | 10u | Capacitor_SMD:C_0402_1005Metric | C103 |
| 1 | 22u | Capacitor_SMD:C_0402_1005Metric | C102 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U102 |
| 1 | PSH_BTN | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW102 |
| 1 | STDC14 | watch_footprints:STDC14 | J101 |
| 1 | SW_SPDT | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | SW101 |
| 1 | TYPE-C-31-M-12 | watch_footprints:TYPE-C-31-M-12 | J103 |
| 1 | Watch_Module_Outline_V2_SS | watch_footprints:Watch Module Outline V2 SS | U101 |
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Questions
How big is the Module test rig PCB?
It measures 46 × 26 mm and has 2 copper layers, 1.61 mm thick.
What parts does the Module test rig use?
16 parts, built around the AMS1117-3.3 and TYPE-C-31-M-12. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Module test rig KiCad files?
From the ben5049/Smart-Watch repository on GitHub, at the commit this page was made from: the board is PCBs/module_test_rig/module_test_rig.kicad_pcb and its schematic PCBs/archived/rfid_module_v1/boost_converter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Module test rig design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).