2 layers27.3 × 34.3 mm
2 layers304.8 × 95.2 mm
Electrical CAD Files for the LMN-3 Project
- Size
- 304.8 × 95.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 106
- Nets
- 104
- Pads
- 436
- Tracks, vias
- 622, 3
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 18 Feb 2022
- Updated
- 4 Jun 2022
Overview
LMN is an open-source printed circuit board by FundamentalFrequency, from the FundamentalFrequency/LMN-3-ECAD repository on GitHub, published under the CC-BY-SA-4.0 licence. It is a 2-layer board of 304.8 × 95.2 mm with 106 parts on 104 nets, routed with 622 tracks and 3 vias.
It is built around the TEENSY 4.1 and COM-09032. Its parts include 49 diodes, 45 switches and 6 ICs. It belongs with the NXP (LPC, Kinetis, i.MX RT) boards of this library.
Main components
2README
README.mdLMN-3-ECAD
This repository contains the KiCad 6 project files for the LMN-3 PCB.
If you would like to support the project, please consider becoming a sponsor.
Bill of Materials
| Description | Model | Quantity | URL |
|---|---|---|---|
| Diode | 1N4148 | 49 | https://www.amazon.com/McIgIcM-1n4148-switching-Standard-Through/dp/B06XB1R2NK |
| Rotary Encoder | EC11 | 4 | https://www.amazon.com/WayinTop-Encoder-Potentiometer-Electronics-Projects/dp/B08728K3YB?psc=1 |
| Switch | 5 pin mechanical keyboard switch | 45 | |
| Joystick | COM-09032 | 1 | https://www.sparkfun.com/products/9032 |
| Microcontroller | Teensy 4.1 | 1 | https://www.pjrc.com/store/teensy41.html |
| Arduino Header Strip | 2 | https://www.amazon.com/gp/product/B07PKKY8BX?psc=1 |
Gerbers
Gerber files are available here if you would like to have a board house manufacture the PCB.
Thanks
This project would not be possible without the following free and open source projects:
Sources for Footprints, Symbols, 3-D Models, and Other Resources
Encoders (Alps EC11E09244AQ)
Teensy 4.1
Thumbstick (SparkFun COM-09032)
Keyboard Switches (Keyswitch Kicad Library)
License
Licensed under the CC-by-SA 4.0 license.
Parts
106| Qty | Value | Footprint | References |
|---|---|---|---|
| 49 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +33 |
| 45 | SW_Push | Switch_Keyboard_Cherry_MX:SW_Cherry_MX_PCB_1.00u | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +29 |
| 4 | EC11E_H20 | LMN:EC11E_H20 | U1, U2, U3, U4 |
| 1 | COM-09032 | LMN:COM-09032 | U5 |
| 1 | teensy_4.1 | LMN:teensy_4.1 | U6 |
The 100 most common of 106 parts.
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Questions
How big is the LMN PCB?
It measures 304.8 × 95.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the LMN use?
106 parts, built around the TEENSY 4.1 and COM-09032. 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 LMN KiCad files?
From the FundamentalFrequency/LMN-3-ECAD repository on GitHub, at the commit this page was made from: the board is LMN.kicad_pcb and its schematic LMN.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LMN design in my own project?
Its repository publishes it under the CC-BY-SA-4.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).