2 layers308.8 × 130.3 mm
CyberKeeb2040
zli117/CyberKeeb2040
Hardware design for a mechanical keyboard based on RP2040 that also has a Pi Zero onboard.
182 parts98CC-BY-SA-4.0
4 layers130 × 148.5 mm
Timer PCB
electro-cafe/electro-cafe.github.ioSite Web de Electro Café
- Size
- 130 × 148.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 91
- Pads
- 153
- Tracks, vias
- 204, 3
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Feb 2025
- Updated
- 11 Oct 2026
Overview
Timer PCB is an open-source printed circuit board by electro-cafe, from the electro-cafe/electro-cafe.github.io repository on GitHub. It is a 4-layer board of 130 × 148.5 mm with 18 parts on 91 nets, routed with 204 tracks and 3 vias.
It is built around the ULN2003 and WS2812. Its parts include 9 diodes, 4 ICs and 3 connectors.
Main components
2
ULN2003
SOP-161.1V@250uA,100mA 25pF 2V 30V 500mA 50uA 50uA Seven channels SOP-16 Darlington Transistor Arrays ROHSBLDarlington Transistor Arrays
WS2812
SMD5050-4P1.57mm 1000mcd 110mcd 120us 2kHz 3.7V~5.3V 300ns 320mcd 451nm 523nm 5mm 5mm 623nm 800Kbit/s Built-in power-on reset circuit、Built-in power-on reset circuit Top-mount SMD5050-4P RGB LEDs(Built-in IC) ROHSWorldsemiRGB LEDs(Built-In IC)
README
README.mdSite web de l'Electro Café
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | WS2812 | LED_SMD:LED_WS2812_PLCC6_5.0x5.0mm_P1.6mm | D10, D11, D12, D13, D14, D15, D16, D17, D18 |
| 3 | JST_05 | Connector_JST:JST_EH_B5B-EH-A_1x05_P2.50mm_Vertical | J1, J2, J3 |
| 3 | ULN2003 | Package_SO:SOIC-16_4.55x10.3mm_P1.27mm | U1, U3, U4 |
| 1 | 100nF | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | condensateur2 |
| 1 | 10uF | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | condensateur1 |
| 1 | ~ | Weemos:S3 Mini | U2 |
Questions
How big is the Timer PCB PCB?
It measures 130 × 148.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Timer PCB use?
18 parts, built around the ULN2003 and WS2812. 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 Timer PCB KiCad files?
From the electro-cafe/electro-cafe.github.io repository on GitHub, at the commit this page was made from: the board is KiCad/Timer_PCB/Timer_PCB.kicad_pcb and its schematic KiCad/Timer_PCB/Test/Test.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Timer PCB design in my own project?
Its repository states no licence, so its author keeps all rights: ask electro-cafe before reusing the design.
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