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4 layersRS232, the printed circuit board in 3D

This is the default project starter for this repository. It is intentionally blank: it contains no RK3399, SBC, or other product-specific circuitry.

Copper layers
4
Thickness
1.6 mm
Parts
19
Nets
44
Pads
89
Tracks, vias
113, 0
Pours
1
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
18 Mar 2026
Updated
23 Oct 2026

Overview

RS232 is an open-source printed circuit board by zeroCountersteer, from the zeroCountersteer/lib.KiCAD repository on GitHub. It is a 4-layer board with 19 parts on 44 nets, routed with 113 tracks and 0 vias.

It is built around the MAX3232CPWRE4. Its parts include 15 capacitors, 3 ICs and 1 connector.

Main components

1

README

templates/General-Project/README.md

General KiCad project template

This is the default project starter for this repository. It is intentionally blank: it contains no RK3399, SBC, or other product-specific circuitry.

The organization and project settings are based on the wired project:

  • A4 portrait ISO 5457 page setup.
  • A blank root schematic ready for hierarchical subsystem sheets.
  • A blank PCB ready for board setup and stackup definition.
  • A project configuration with useful BOM fields and DNP/BOM controls.
  • A local lib symbol/footprint table for this repository's library.

The generic components in symbols/Project_Generic.kicad_sym are intended for quick placement. They expose the fields normally needed for documentation and BOM work: value, footprint, datasheet, description, manufacturer, MPN, and assembly/BOM inclusion controls. KiCad's standard libraries remain available through the normal system configuration.

Create a project

After installing lib.KiCAD through PCM, copy this directory from the installed package's templates/General-Project/ directory into your project folder and rename the three General-Project.kicad_* root files together. The template is also present in the repository checkout.

Alternatively, from the repository root:

text
python3 scripts/create_project_from_template.py path/to/new-project

The script copies the template and renames the root project files. Add hierarchical sheets beside the renamed root schematic; keep each sheet in the same directory unless you intentionally create a subdirectory hierarchy.

Parts

19
QtyValueFootprintReferences
150.1мкФCapacitor_SMD:C_0603_1608MetricC11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25
3MAX3232CPWRPackage_SO:TSSOP-16_4.4x5mm_P0.65mmU4, U5, U6
1DE9_Pins_MountingHolesConnector_Dsub:DSUB-9_Pins_Horizontal_P2.77x2.84mm_EdgePinOffset4.94mm_Housed_MountingHolesOffset4.94mmJ2

Questions

What parts does the RS232 use?

19 parts, built around the MAX3232CPWRE4. 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 RS232 KiCad files?

From the zeroCountersteer/lib.KiCAD repository on GitHub, at the commit this page was made from: the board is design_blocks/Library.kicad_blocks/RS232.kicad_block/RS232.kicad_pcb and its schematic design_blocks/Library.kicad_blocks/RS232.kicad_block/RS232.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the RS232 design in my own project?

Its repository states no licence, so its author keeps all rights: ask zeroCountersteer before reusing the design.

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