6 layers131.5 × 132.4 mm
BedCooler
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A dual-zone heating and cooling controller for a bed: a 6-layer KiCad board with an STM32G474 real-time controller and a Raspberry Pi Compute Module 5 host.
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2 layers24.4 × 81.2 mm
Chemecar
Momozavur/chemecarOpen the appropriate .kicadpro file in KiCad; .pro entries are legacy projects. Keep schematics, boards, local libraries, library tables, and supporting files together.
- Size
- 24.4 × 81.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 15
- Nets
- 37
- Pads
- 64
- Tracks, vias
- 46, 5
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Sep 2026
- Updated
- 10 Sep 2026
Overview
Chemecar is an open-source printed circuit board by Momozavur, from the Momozavur/chemecar repository on GitHub. It is a 2-layer board of 24.4 × 81.2 mm with 15 parts on 37 nets, routed with 46 tracks and 5 vias.
It is built around the AO3400A and B340A-13-F-MS. Its parts include 5 connectors, 2 resistors, 1 IC, 1 diode and 1 transistor.
Main components
2README
README.mdchemecar
KiCad design files for chemecar.
Project files
Open the appropriate .kicad_pro file in KiCad; .pro entries are legacy projects. Keep schematics, boards, local libraries, library tables, and supporting files together. Hierarchical schematic sheets are part of their parent design.
Git workflow
Automatic backups, recovery files, editor state, and filesystem metadata are ignored. Existing fabrication outputs and local component libraries are retained. For existing repositories, ignore rules do not automatically untrack previously committed files.
Review and save a meaningful design revision with:
git status --short
git diff
git add -- <changed-files>
git commit -m "Describe the design change"Documentation images
Add a clear 3D board view at docs/images/board-3d.png and, optionally, a PCB layout view at docs/images/pcb-layout.png. A schematic PDF is useful for reading circuit details. Once present, embed an image in this README with . For folders with several designs, use a separate named image for each.
Design notes to complete
Describe purpose, power and connectors, revision status, assembly requirements, and what has been physically tested. The repository setup does not establish electrical correctness or manufacturing readiness.
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | LOGO | LOGO | G***, G*** |
| 1 | 100k | Resistor_SMD:R_1206_3216Metric | R2 |
| 1 | 220 | Resistor_SMD:R_1206_3216Metric | R1 |
| 1 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Arduino Micro | imports:arduinomicro | U1 |
| 1 | B340A-13-F | imports:DIODE_SODB340_2P92X4P6_DIO-L | D1 |
| 1 | G5LE-1 DC5 | Relay_THT:Relay_SPDT_Omron-G5LE-1 | K2 |
| 1 | batt | TerminalBlock:CUI_TB002-500-02BE | J6 |
| 1 | motor | TerminalBlock:CUI_TB002-500-02BE | J4 |
| 1 | rgb | Connector_JST:JST_EH_B3B-EH-A_1x03_P2.50mm_Vertical | J2 |
| 1 | sensor | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J3 |
| 1 | switch | Connector_JST:JST_EH_B2B-EH-A_1x02_P2.50mm_Vertical | J1 |
The 13 most common of 15 parts.
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Questions
How big is the Chemecar PCB?
It measures 24.4 × 81.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Chemecar use?
15 parts, built around the AO3400A and B340A-13-F-MS. 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 Chemecar KiCad files?
From the Momozavur/chemecar repository on GitHub, at the commit this page was made from: the board is chemecar.kicad_pcb and its schematic chemecar.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Chemecar design in my own project?
Its repository states no licence, so its author keeps all rights: ask Momozavur before reusing the design.