HardLabs

Cuttle2fish

tahnok·cuttle2fish·hardware/cuttle2fish.kicad_pcb

Cuttle2fish PCB layout, top view — open source STM32 board by tahnok

About the Cuttle2fish PCB

Cuttle2fish is an open source STM32 PCB design by tahnok, published on GitHub under the Unlicense license. It is a 2-layer board measuring 22.4 × 47.3 mm, with 25 components from 14 distinct parts.

Its main chip is the STM32F103R(8-B)Tx, from the STM32 family. Other key parts include the LP2985-3.3 and APA102-2020. By type, the board carries 11 capacitors, 4 ICs, 3 resistors, 2 connectors, 2 diodes and 1 crystal.

From the project

Something you know (password) and something you have (cuttlefish shaped U2F token)

Something you know (password) and something you have (cuttlefish shaped U2F token)

Intended to be based on https://github.com/gl-sergei/u2f-token

https://github.com/tahnok/wiki/wiki/cuttle2fish

Cuttle2fish, from the project README
From the project README

Main components on the Cuttle2fish

LP2985-3.3STM32F103R(8-B)TxAPA102-2020

Cuttle2fish bill of materials (BOM)

25 components, 14 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LP2985-3.3
U1
1
STM32F103R(8-B)Tx
U2
2
APA102-2020
U3, U4
1
10PF
10pF
Y1
2
CONN_01x05
J2, J3
1
B3U-1000P
SW_SPST
SW1
1
G***
svg2mod
2
LED
D1, D2
6
100NF
100nF
C1, C2, C3, C4, C5, C6
2
4.7UF
4.7uF
C7, C9
1
10NF
10nF
C8
2
4.7PF
4.7pF
C10, C11
1
10K
R1
2
330
R2, R3

Cuttle2fish design files

The KiCad project lives in the tahnok/cuttle2fish repository on GitHub; these links point at the commit this page was built from.

Cuttle2fish: common questions

What microcontroller does the Cuttle2fish use?

The Cuttle2fish is built around the STM32F103R(8-B)Tx, from the STM32 family.

How big is the Cuttle2fish PCB?

The Cuttle2fish measures 22.4 × 47.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Cuttle2fish?

25 components, from 14 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Cuttle2fish design files?

From the tahnok/cuttle2fish repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Cuttle2fish design in my own project?

Yes, under the terms of its Unlicense license, which tahnok chose for the repository.

Can I test firmware for the Cuttle2fish 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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