2 layers159.5 × 30 mm
Type f
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
25 parts3kApache-2.0
2 layers62.5 × 86.3 mm
Xiao rp2350-timer
Shadow8928/rp2350-timer- Size
- 62.5 × 86.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 40
- Pads
- 114
- Tracks, vias
- 231, 13
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 9 Oct 2026
- Updated
- 18 Oct 2026
Overview
Xiao rp2350-timer is an open-source printed circuit board by Shadow8928, from the Shadow8928/rp2350-timer repository on GitHub. It is a 2-layer board of 62.5 × 86.3 mm with 25 parts on 40 nets, routed with 231 tracks and 13 vias.
Its parts include 11 diodes, 10 switches, 3 connectors and 1 IC. It belongs with the RP2350 boards of this library.
README
README.mdXIAO-RP2350-Timer
I made this project in order to track the time i spend when doing certain tasks but i didn't want to use my phone in order to avoid distraction as well as when i study or work during the school day when i don't have my phone on me. originally the plan was to use an rp2040 chip with components but it proved too complicated for me to use and required equipment i didn't have. I decided on a xiao rp2350 as it already had lipo battery use prebuilt and was small to allow for the small form factor i was aiming for.
Parts List
| Item | Price | Link |
|---|---|---|
| XIAO RP2350 | $1.09 | AliExpress |
| Diodes | $2.49 | AliExpress |
| LiPo battery | $1.09 | AliExpress |
| Cherry switches | $0.33 | AliExpress — 3 for $0.99 |
| Buzzers | $0.33 | AliExpress — 3 for $0.99 |
| 0.91-inch OLED screen | $0.33 | AliExpress — 3 for $0.99 |
| LED diodes | $3.41 | AliExpress |
| PCB | $11.01 | JLCPCB |
| Liquid flux | $4.85 | AliExpress |
| Total | $24.93 |
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 1N914 | Diode_SMD:D_SOD-323_HandSoldering | D1, D2, D3, D4, D5, D6, D7, D8, D9 |
| 9 | SW_Push_45deg | MX_Solderable:MX-Solderable-1U | SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10 |
| 2 | Conn_01x02 | Connector:JWT_A3963_1x02_P3.96mm_Vertical | J1, J3 |
| 1 | Conn_01x04 | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:SSD1306-0.91-OLED-4pin-128x32 | J2 |
| 1 | D | Diode_SMD:D_SOD-323_HandSoldering | D10 |
| 1 | LED | LED_SMD:LED_0805_2012Metric | D11 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_MountingHoles | SW1 |
| 1 | XIAO-RP2350-SMD | Seeed Studio XIAO Series Library:XIAO-RP2350-SMD | U1 |
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Questions
How big is the Xiao rp2350-timer PCB?
It measures 62.5 × 86.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Xiao rp2350-timer use?
25 parts. 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 Xiao rp2350-timer KiCad files?
From the Shadow8928/rp2350-timer repository on GitHub, at the commit this page was made from: the board is xiao-rp2350-timer/xiao-rp2350-timer.kicad_pcb and its schematic xiao-rp2350-timer/xiao-rp2350-timer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Xiao rp2350-timer design in my own project?
Its repository states no licence, so its author keeps all rights: ask Shadow8928 before reusing the design.