HardLabs

Tako

ssbb·tako·rev0/pcb/tako.kicad_pcb

Tako PCB layout, top view — open source STM32 board by ssbb

About the Tako PCB

Tako is an open source STM32 PCB design by ssbb, published on GitHub under the MIT license. It is a 4-layer board measuring 230.7 × 97.8 mm, with 76 components from 18 distinct parts.

Its main chip is the STM32F401CBUx, from the STM32 family. Other key parts include the XC6206PxxxMR, OPA350 and 74HC4051. By type, the board carries 34 resistors, 24 capacitors, 8 ICs, 2 crystals, 2 fuses and 2 jumpers.

It belongs with the keyboards designs in this gallery.

From the project

34 key EC split keyboard

- Features - Caveats - BOM - Build guide - Firmware

- Onboard USB-C with ESD protection - STM32F4x1 MCU - Actuation Point Changer - USART Full-duplex - OLED support

- No tenting puck support since there is no space between housings for screw holes. But could be done on bottom plate with different case design. - No reset button (the one you see on the photo is a STM32 Boot0)

Tako, from the project README
From the project README

Main components on the Tako

STM32F401CBUxXC6206PxxxMROPA35074HC4051

Tako bill of materials (BOM)

76 components, 18 distinct parts.

QtyPartRefs
2
STM32F401CBUx
U1, U101
2
XC6206PxxxMR
U2, U102
2
OPA350
U3, U103
2
74HC4051
U4, U104
2
8 MHz
Y1, Y101
2
500mA
F1, F101
2
BOOT0
JP1, JP101
2
TYPEC-304YSSW-ACP16
USB1, USB101
2
PRTR5V0U2X
D1, D101
6
1u
C1, C2, C8, C101, C102, C108
14
100n
C3, C4, C5, C6, C7, C10, C12, C103 +6
2
4.7u
C9, C109
2
220p
C11, C111
4
5.1k
R1, R2, R101, R102
14
100k
R3, R11, R13, R14, R15, R16, R17, R103 +6
8
100
R4, R5, R6, R7, R104, R105, R106, R107
6
10k
R8, R9, R10, R108, R109, R110
2
1k
R12, R112

Tako design files

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

Tako: common questions

What microcontroller does the Tako use?

The Tako is built around the STM32F401CBUx, from the STM32 family.

How big is the Tako PCB?

The Tako measures 230.7 × 97.8 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Tako?

76 components, from 18 distinct parts. The full bill of materials is listed on this page.

Where can I download the Tako design files?

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

Can I use the Tako design in my own project?

Yes, under the terms of its MIT license, which ssbb chose for the repository.

Can I test firmware for the Tako 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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