Skip to the content
PCBKitNew board
2 layers31.5 × 24.5 mmMason, the printed circuit board in 3D

Shared projects

Size
31.5 × 24.5 mm
Copper layers
2
Thickness
2.63 mm
Parts
20
Nets
48
Pads
111
Tracks, vias
181, 21
Pours
1
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
22 Nov 2024
Updated
18 Mar 2026

Overview

Mason is an open-source printed circuit board by slvusd, from the slvusd/projects repository on GitHub. It is a 2-layer board of 31.5 × 24.5 mm with 20 parts on 48 nets, routed with 181 tracks and 21 vias.

It is built around the BNO055 and LP2985-33DBV. Its parts include 8 capacitors, 7 resistors, 3 ICs and 1 connector.

Main components

2

README

README.md

Projects

The purpose of this repo is to sync teacher and student work to a repo so it can be shared and so it will not get lost.

To add a new computer to this repo, run these commands:

text
git config --global user.name slvusd-gitbot
git config --global user.email "ebrown+gitbot@slvusd.org"
git config --global credential.helper store

Then from pi's home directory, run

text
git -c credential.helper= clone https://github.com/slvusd/projects.git src

You will be prompted for the username (slvusd-github) and password. Get the password (token) from Mr. Brown.

You need to run $HOME/src/git_sync.sh once from the command line and enter the same credentials in order to have the credentials cached for cron.

Finally, run crontab -e and add the following entry:

text
*/5 * * * * /home/pi/src/git_sync.sh

That's it!

Parts

20
QtyValueFootprintReferences
40.1µFCapacitor_SMD:C_0603_1608MetricC5, C6, C7, C8
310kResistor_SMD:R_0603_1608MetricR5, R6, R7
21µFCapacitor_SMD:C_0603_1608MetricC1, C2
24.7kResistor_SMD:R_0603_1608MetricR3, R4
25.1kResistor_SMD:R_0603_1608MetricR1, R2
1100nFCapacitor_SMD:C_0603_1608MetricC3
110µFCapacitor_SMD:C_0603_1608MetricC4
1BNO055Package_LGA:LGA-28_5.2x3.8mm_P0.5mmU1
1LP2985-3.3Package_TO_SOT_SMD:SOT-23-5U3
1MCP2221AxMLPackage_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mmU2
1USB_C_Receptacle_USB2.0_14PConnector_USB:USB_C_Receptacle_Amphenol_124019772112AJ1

The 19 most common of 20 parts.

Questions

How big is the Mason PCB?

It measures 31.5 × 24.5 mm and has 2 copper layers, 2.63 mm thick.

What parts does the Mason use?

20 parts, built around the BNO055 and LP2985-33DBV. 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 Mason KiCad files?

From the slvusd/projects repository on GitHub, at the commit this page was made from: the board is mason/PCB.kicad_pcb and its schematic mason/Float-2026.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Mason design in my own project?

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

More from slvusd/projects

1
  • 2 layers104.5 × 57.5 mmFloat-2026, the printed circuit board in 3D

    Float-2026

    slvusd/projects

    Shared projects

    20 parts1

Similar boards

  • 2 layers50.5 × 128.5 mmOpenThereminV45, the printed circuit board in 3D

    OpenThereminV45

    GaudiLabs/OpenThereminV4

    Open Source Theremin Instrument

    107 parts249GPL-3.0
  • 2 layers36.5 × 56 mmFoc driver, the printed circuit board in 3D

    Foc driver

    sirojudinMunir/sf-motion

    Open-source Motion Control Platform

    132 parts135MIT
  • 2 layers135 × 100 mmZ80vga, the printed circuit board in 3D

    Z80vga

    anjennings/Tom80

    2B is the "definitive" version so all code going forward is designed for that version of the board. Minor hardware differences mean that code for 2.0 may not work on 2.0B without tweaks (mostly related to ram banking)

    53 parts94MIT
  • 4 layers44 × 64 mmJTAGProgrammer, the printed circuit board in 3D

    JTAGProgrammer

    anthony-bernaert/ftdi-jtag-programmer

    FTDI-based JTAG Programmer Circuit for FPGAs

    122 parts77CERN-OHL-P-2.0
  • 4 layers58.4 × 101.9 mmUp5k osc, the printed circuit board in 3D

    Up5k osc

    emeb/up5k_osc

    The brute-force approach is to synthesize these analog waveforms at sufficiently high sample rates that the timing jitter becomes imperceptible.

    137 parts36MIT
  • 2 layers160 × 112 mmSi5351ABreakout panel, the printed circuit board in 3D

    Si5351ABreakout panel

    land-boards/lb-boards

    land-boards - Board Designs

    5,249 parts31
  • 2 layers38.1 × 101.6 mmRP2040 Audio, the printed circuit board in 3D

    RP2040 Audio

    emeb/RP2040_Audio

    A Eurorack module for stereo audio effects based on the Raspberry Pi RP2040 MCU

    121 parts23MIT
  • 2 layers34 × 23.4 mmDWAVE, the printed circuit board in 3D

    DWAVE

    hkzlab/DWAVE_MIDI_Wavetable

    DWAVE is a small General MIDI module for the wavetable connector of your old sound card, based on the SAM2695 chip

    28 parts20