2 layers70.1 × 43.2 mm
Iaq device
nkitanov/iaq_board
IAQ Board is a DIY (Do-It-Yourself) device for measuring internal air quality
19 parts396
2 layers116.8 × 60.3 mm
Walking Logger
ColouredCat/Walking_LoggerOpen source design for a GPS and weather monitoring device
- Size
- 116.8 × 60.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 7
- Nets
- 60
- Pads
- 107
- Tracks, vias
- 74, 0
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 18 Mar 2026
- Updated
- 26 Jul 2026
Overview
Walking Logger is an open-source printed circuit board by ColouredCat, from the ColouredCat/Walking_Logger repository on GitHub. It is a 2-layer board of 116.8 × 60.3 mm with 7 parts on 60 nets, routed with 74 tracks and 0 vias.
It is built around the BME280. It belongs with the RP2040 boards of this library.
Main components
1README
README.mdWalking Logger
A handy pocket-sized device to use while hiking to track you position on a map, heading, and current weather predictions without need for a mobile phone - very handy for cheating on your DofE expeditions!
This project is part of Hack Club Stasis.
Components
- Rasperry Pi Pico microcontroller with micropython
- Ublox NEO-6M GPS
- BME280 Tempertaure, pressure and humidity sensor
- 2x SSD1306 OLED Display
- Ansman 16340 Li-ion battery
A complete bill of materials is included in PCB/material.csv.
PCB and Schematic
The most up to date version of the PCB and schematics is included in the KiCad project in the PCB folder, as well as custom footprints and symbols for the components used freely. Pre-build gerber files are also included in the output folder.
Current PCB:
Current Schematic:
Parts
7| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | ssd1306 | ssd1306:ssd1306 | SD1, SD2 |
| 1 | 3.3V | ansman16340:ansman16340 | BT1 |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_Common_Unspecified | A1 |
| 1 | SW_SPDT | Button_Switch_THT:SW_Lever_1P2T_NKK_GW12LxH | SW1 |
| 1 | bme280 | bme280:BME280 | BE1 |
| 1 | ~ | neo6m:ublox_neo6m | GP1 |
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Questions
How big is the Walking Logger PCB?
It measures 116.8 × 60.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Walking Logger use?
7 parts, built around the BME280. 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 Walking Logger KiCad files?
From the ColouredCat/Walking_Logger repository on GitHub, at the commit this page was made from: the board is PCB/walking_logger/walking_logger.kicad_pcb and its schematic PCB/walking_logger/walking_logger.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Walking Logger design in my own project?
Its repository states no licence, so its author keeps all rights: ask ColouredCat before reusing the design.