HardLabs

Sprocket

jamesmunns·brick-mount·boards/sprocket/sprocket.kicad_pcb

Sprocket PCB layout, top view — open source STM32 board by jamesmunns

About the Sprocket PCB

Sprocket is an open source STM32 PCB design by jamesmunns, published on GitHub. It is a 4-layer board measuring 47 × 15 mm, with 32 components from 17 distinct parts.

Its main chip is the STM32G031G8U6, from the STM32 family. Other key parts include the AP2210N-3.3TRG1. By type, the board carries 7 capacitors, 7 resistors, 6 diodes, 5 connectors, 2 ICs and 2 switches.

From the project

Put your circuits on your plastic bricks of choice

Boards designed to be compatible with LEGO and other plastic building blocks.

There are KiCAD footprints for a variety of different brick arrangements in the parts folder. I've also included a number of personal projects using these footprints in the boards/ folder.

The contents of the parts/brick-49id-60od.pretty/ folder are licensed under a CC0 license.

Sprocket, from the project README
From the project README

Main components on the Sprocket

STM32G031G8U6AP2210N-3.3TRG1

Sprocket bill of materials (BOM)

32 components, 17 distinct parts.

QtyPartRefs
1
STM32G031G8U6
U1
1
AP2210N-3.3TRG1
U2
1
NX7002BKR
Q1
1
SPROCKET-CONN
J1
2
Conn_01x04_MountingPin
J4, J6
2
Conn_01x04_MountingPin
J5, J7
2
Conn_01x02
MH1, MH2
2
SW_Push
SW1, SW2
1
B5819W
D1
2
TC3838RGB
D2, D3
3
LED
D4, D5, D6
2
100nF
C1, C2
1
4.7uF
C3
3
1uF
C4, C6, C7
1
2.2uF
C5
2
10K
R2, R3
5
1K
R4, R5, R6, R7, R8

Sprocket design files

The KiCad project lives in the jamesmunns/brick-mount repository on GitHub; these links point at the commit this page was built from.

Sprocket: common questions

What microcontroller does the Sprocket use?

The Sprocket is built around the STM32G031G8U6, from the STM32 family.

How big is the Sprocket PCB?

The Sprocket measures 47 × 15 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Sprocket?

32 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the Sprocket design files?

From the jamesmunns/brick-mount repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Sprocket design in my own project?

The repository has no license, so all rights stay with jamesmunns. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Sprocket without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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