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2 layers40 × 110 mmLogic, the printed circuit board in 3D

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Size
40 × 110 mm
Copper layers
2
Thickness
1.6 mm
Parts
58
Nets
45
Pads
161
Tracks, vias
252, 2
Pours
1
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
15 Jun 2024
Updated
7 Sep 2026

Overview

Logic is an open-source printed circuit board by Alloyed, from the Alloyed/KitsBlips repository on GitHub, published under the MIT licence. It is a 2-layer board of 40 × 110 mm with 58 parts on 45 nets, routed with 252 tracks and 2 vias.

It is built around the TL072. Its parts include 18 diodes, 14 resistors, 11 capacitors, 9 connectors and 5 ICs.

Main components

1

README

README.md

KitsBlips

Monorepo for my Eurorack/synthesizer hobby projects! (that's me, I'm kit)

Everything is always in a state of "not-quite-finished". if something is unclear or unusable in its current state, and you want to use it, feel free to open an issue or contact me.

For technical reasons, this project is ordered by toolset and not by module. this means the full source for a single module may be across multiple folders! Sorry.

unless otherwise listed, all code is MIT licensed. All hardware designs and graphics (kicad, svg etc) are CC-BY-SA 4.0.

Building/Installing

Each project/folder has a specific readme that includes extra steps if necessary, but in general, builds are managed using cmake.

text
$ mkdir -p <folder>/build && cd <folder>/build
$ cmake .. -DCMAKE_BUILD_TYPE=<build type: Debug, MinSizeRel, RelWithDebInfo>
$ cmake --build . --config=<the build type>
$ cmake --install . --prefix <location> # if the target supports installation
$ ctest # if the target has unit tests

once you have all your configurations set up, you can quickly rebuild all/run tests using rebuild-all.sh.

Projects

For Hardware:

  • /daisy
    • DSP code for hardware modules, using the Daisy microcontroller.
  • /kicad
    • Hardware design files

For VCV Rack:

For DAWS:

  • /daw
    • Modules for DAWS (VST3/CLAP plugins)
  • /clapeze
    • Microframework for writing clap plugins
  • /kitgui
    • UI library for clap plugins

Shared:

  • /panels
    • Art/Panel designs.
  • /kitdsp
    • Shared DSP code, runs on all platforms
  • /kitdsp-gpl
    • DSP code with GPL algorithms. This is the only folder that comes with extra license restrictions!

AI statement

KitsBlips will not accept PRs that are generated wholly or in significant part by generative AI. Future development will not use Generative AI.

There are a few older commits where I tried it for automatic refactoring, found it less than successful, and cleaned it up afterward. You can try the same thing; I wouldn't be able to tell the difference probably, but my conclusion to that experiment was that it wasn't worth it at the time.

Parts

58
QtyValueFootprintReferences
10DPCM_4ms_Diode:D_DO-35_P7.62mm_HorizontalD1, D2, D3, D4, D5, D6, D7, D8, D9, D10
80.1ufCapacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mmC4, C5, C6, C7, C8, C9, C10, C11
61kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_HorizontalR4, R6, R8, R10, R12, R14
63kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_HorizontalR3, R5, R7, R9, R11, R13
6LEDLED_THT:LED_D3.0mmD11, D12, D13, D14, D15, D16
3TL072Package_DIP:DIP-8_W7.62mmU2, U3, U4
2100kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_HorizontalR1, R2
210uFKitsBlips:CP_Radial_P2.5mmC1, C2
21N5819Diode_THT:D_DO-41_SOD81_P10.16mm_HorizontalD17, D18
10.33ufCapacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mmC3
140106Package_DIP:DIP-14_W7.62mm_SocketU1
1A_AND_B_OUTKitsBlips:Jack_3.5mm_Thonk_Mono_Horizontal_WQP729JHJ4
1A_INKitsBlips:Jack_3.5mm_Thonk_Mono_Horizontal_WQP729JHJ1
1A_NOR_B_OUTKitsBlips:Jack_3.5mm_Thonk_Mono_Horizontal_WQP729JHJ8
1A_OR_B_OUTKitsBlips:Jack_3.5mm_Thonk_Mono_Horizontal_WQP729JHJ3
1A_XOR_B_OUTKitsBlips:Jack_3.5mm_Thonk_Mono_Horizontal_WQP729JHJ5
1B_INKitsBlips:Jack_3.5mm_Thonk_Mono_Horizontal_WQP729JHJ2
1EURO_PWR_2x5KitsBlips:Pins_2x05_2.54mm_TH_Europower_shroudedJ9
1L78L05_TO92Package_TO_SOT_THT:TO-92_InlineU5
1NOT_A_OUTKitsBlips:Jack_3.5mm_Thonk_Mono_Horizontal_WQP729JHJ6
1NOT_B_OUTKitsBlips:Jack_3.5mm_Thonk_Mono_Horizontal_WQP729JHJ7

The 57 most common of 58 parts.

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Questions

How big is the Logic PCB?

It measures 40 × 110 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Logic use?

58 parts, built around the TL072. 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 Logic KiCad files?

From the Alloyed/KitsBlips repository on GitHub, at the commit this page was made from: the board is kicad/logic/logic.kicad_pcb and its schematic kicad/4knobs/4knobs.circuitjs.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Logic design in my own project?

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