HardLabs

Earringv3

aykevl·things·earring-ring-rgb36v3/earringv3.kicad_pcb

Earringv3 PCB layout, top view — open source STM32 board by aykevl
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About the Earringv3 PCB

Earringv3 is an open source STM32 PCB design by aykevl, published on GitHub. It is a 2-layer board measuring 24 × 30.3 mm, with 58 components from 8 distinct parts.

Its main chip is the STM32U031K8Ux, from the STM32 family. Other key parts include the GMA2718H09-F42-4P. By type, the board carries 36 diodes, 14 resistors, 4 capacitors, 2 ICs and 2 switches.

From the project

Collection of microcontroller projects

This is my personal stash of small electronics projects, usually written using TinyGo.

I won't guarantee anything about it. All I can say is that it did work for me at some point and I like sharing what I made. Many things are written once and then mostly forgotten so I probably won't provide any support for any of the code.

Feel free to use this code however you wish (in other words, you can treat it as public domain). Especially for small parts I won't mind if you just copy it in your project. For larger pieces of code or if you copy a project entirely, I would appreciate attribution…

Main components on the Earringv3

STM32U031K8UxGMA2718H09-F42-4P

Earringv3 bill of materials (BOM)

58 components, 8 distinct parts.

QtyPartRefs
1
STM32U031K8Ux
U1
1
GMA2718H09-F42-4P
U2
2
SW_Push
SW1, SW2
36
LED_ARGB
D1, D2, D3, D4, D5, D6, D7, D8 +28
1
10uF
C1
3
0.1uF
C2, C3, C4
5
330
R1, R2, R3, R12, R14
9
2k
R4, R5, R6, R7, R8, R9, R10, R11 +1

Earringv3 design files

The KiCad project lives in the aykevl/things repository on GitHub; these links point at the commit this page was built from.

Earringv3: common questions

What microcontroller does the Earringv3 use?

The Earringv3 is built around the STM32U031K8Ux, from the STM32 family.

How big is the Earringv3 PCB?

The Earringv3 measures 24 × 30.3 mm, has 2 copper layers and is 0.8 mm thick.

How many components are on the Earringv3?

58 components, from 8 distinct parts. The full bill of materials is listed on this page.

Where can I download the Earringv3 design files?

From the aykevl/things repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Earringv3 design in my own project?

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

Can I test firmware for the Earringv3 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.

More boards in things

Earlier revisions in the repo: earring

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