4 layers74.5 × 64.6 mm
4 layers79.8 × 74.6 mm
Timer pcb stepper
electro-cafe/Timer_PCBAll file relative to the PCB of the timer project
- Size
- 79.8 × 74.6 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 64
- Pads
- 149
- Tracks, vias
- 204, 4
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 31 May 2025
- Updated
- 12 Aug 2025
Overview
Timer pcb stepper is an open-source printed circuit board by electro-cafe, from the electro-cafe/Timer_PCB repository on GitHub. It is a 4-layer board of 79.8 × 74.6 mm with 34 parts on 64 nets, routed with 204 tracks and 4 vias.
It is built around the ULN2003. Its parts include 11 connectors, 8 capacitors and 4 ICs. It belongs with the robots and motor control boards of this library.
Main components
1README
README.mdTimer_PCB
This repository contain all file relative to the PCB of the timer project.
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C4, C6, C8 |
| 4 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1, C3, C5, C7 |
| 4 | JST_03 | Connector_JST:JST_XH_S3B-XH-A-1_1x03_P2.50mm_Horizontal | J4, J5, J6, J7 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad_TopOnly | H1, H2, H3, H4 |
| 4 | TestPoint | TestPoint:TestPoint_Loop_D2.54mm_Drill1.5mm_Beaded | TP1, TP2, TP3, TP4 |
| 3 | JST_05 | Connector_JST:JST_EH_B5B-EH-A_1x05_P2.50mm_Vertical | J1, J9, J10 |
| 3 | ULN2003 | Package_SO:SOIC-16_4.55x10.3mm_P1.27mm | U2, U3, U4 |
| 1 | Conn_01x04_Pin | Connector_JST:JST_XA_B04B-XASK-1-A_1x04_P2.50mm_Vertical | J11 |
| 1 | JST_03_Led_panel | Connector_JST:JST_XH_S3B-XH-A-1_1x03_P2.50mm_Horizontal | J8 |
| 1 | LOGO | image.preety:QR_blog_electro_cafe_10x10 | G*** |
| 1 | LOGO | image.preety:QR_portfolio_10x10 | G*** |
| 1 | On/off | Connector_JST:JST_XH_B2B-XH-AM_1x02_P2.50mm_Vertical | J3 |
| 1 | battery | Connector_JST:JST_XH_B2B-XH-AM_1x02_P2.50mm_Vertical | J2 |
| 1 | ~ | Weemos:S3 Mini | U1 |
The 33 most common of 34 parts.
Questions
How big is the Timer pcb stepper PCB?
It measures 79.8 × 74.6 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Timer pcb stepper use?
34 parts, built around the ULN2003. 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 stepper KiCad files?
From the electro-cafe/Timer_PCB repository on GitHub, at the commit this page was made from: the board is timer-pcb-stepper/timer-pcb-stepper.kicad_pcb and its schematic timer-pcb-led/timer-pcb-led.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Timer pcb stepper 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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