HardLabs

Bonk

arko9699·bonk·pcbs/rev2/bonk.kicad_pcb

Bonk PCB layout, top view — open source STM32 board by arko9699

About the Bonk PCB

Bonk is an open source STM32 PCB design by arko9699, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 155.5 × 2 mm, with 71 components from 20 distinct parts.

Its main chip is the STM32F072CBTx, from the STM32 family. Other key parts include the XC6206PxxxMR and USBLC6-2SC6. By type, the board carries 45 diodes, 11 capacitors, 7 resistors, 3 ICs, 2 connectors and 1 transistor.

It belongs with the keyboards designs in this gallery.

From the project

A 13u row-staggered keyboard using MX switches and STM32

Common Steps: 1. Plug in the PCB to the computer using an USB cable (either using uDB or directly) 2. Use QMK Toolbox on Windows/Mac. Only CLI method is supported on Linux. Select the 'bin' firmware file on your disk. 3. Hold down button for approximately 10 seconds to enter bootloader. 4. Select the 'Flash' option and wait for some time. The PCB should restart automatically after flashing and be ready to use. 5. Open vial in a USB HID supported browser (Chrome/Edge/Brave etc.) to modify your keymap.

Bonk, from the project README
From the project README

Main components on the Bonk

XC6206PxxxMRSTM32F072CBTxUSBLC6-2SC6

Bonk bill of materials (BOM)

71 components, 20 distinct parts.

QtyPartRefs
1
XC6206PxxxMR
U1
1
STM32F072CBTx
U2
1
USBLC6-2SC6
U3
1
2N7002
Q1
1
Conn_01x04
J1
1
USB_C_Receptacle_USB2.0_14P
J4
1
500mA
F1
1
SW_Push
SW1
45
1N4148W
D1, D2, D3, D4, D5, D6, D7, D8 +37
4
100n
C1, C2, C4, C10
2
4.7u
C3, C7
3
1u
C5, C8, C9
1
10n
C6
1
10u
C11
2
5.1k
R1, R2
1
330k
R3
1
1M
R4
1
100
R5
1
10k
R6
1
1k
R7

Bonk design files

The KiCad project lives in the arko9699/bonk repository on GitHub; these links point at the commit this page was built from.

Bonk: common questions

What microcontroller does the Bonk use?

The Bonk is built around the STM32F072CBTx, from the STM32 family.

How big is the Bonk PCB?

The Bonk measures 155.5 × 2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Bonk?

71 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the Bonk design files?

From the arko9699/bonk repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Bonk design in my own project?

Yes, under the terms of its GPL-3.0 license, which arko9699 chose for the repository.

Can I test firmware for the Bonk 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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