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2 layers256 × 72 mmKb2 v7, the printed circuit board in 3D

Some small projects organized by year and month with development environments managed by nix and direnv

Size
256 × 72 mm
Copper layers
2
Thickness
1.6 mm
Parts
66
Nets
57
Pads
471
Tracks, vias
395, 0
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
8 Jul 2024
Updated
2 Oct 2026

Overview

Kb2 v7 is an open-source printed circuit board by LilleAila, from the LilleAila/projects repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 256 × 72 mm with 66 parts on 57 nets, routed with 395 tracks and 0 vias.

Its parts include 28 diodes and 28 switches.

README

readme.md

Small programming projects

Some small projects organized by year and month with development environments managed by nix and direnv

Devshell templates

Usage:

bash
# .envrc
use flake github:LilleAila/projects#nix
use flake github:LilleAila/projects#python
use nix
nix
# shell.nix
{ pkgs ? import <nixpkgs> {} }: with pkgs; mkShell {
  nativeBuildInputs = [
    (python311.withPackages (ps: with ps; [
      matplotlib
      numpy
      tkinter
    ]))
  ];
}

Parts

66
QtyValueFootprintReferences
28ComboDiodeD1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +12
28PG1350S1, S2, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22, S23 +12
8Mount_Hole_2.2mm_Pad_Via_1, _2, _3, _4, _5, _6, _7, _8
1E73:SW_TACT_ALPS_SKQGABE010B1
1ProMicroMCU1

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Questions

How big is the Kb2 v7 PCB?

It measures 256 × 72 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Kb2 v7 use?

66 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 Kb2 v7 KiCad files?

From the LilleAila/projects repository on GitHub, at the commit this page was made from: the board is 2025/ergogen/kb2_v7/pcb/pcb.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Kb2 v7 design in my own project?

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).