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Le Chiffre STM32

sporkus·le_chiffre_keyboard_stm32·kicad/pcb_36key/stm32_chiffre_36keys.kicad_pcb

Le Chiffre STM32 PCB layout, top view — open source STM32 board by sporkus
Simulate this board

About the Le Chiffre STM32 PCB

Le Chiffre STM32 is an open source STM32 PCB design by sporkus, published on GitHub under the CERN-OHL-W-2.0 license. It is a 2-layer board measuring 227.4 × 84.9 mm, with 115 components from 22 distinct parts.

Its main chip is the STM32F072CBT6, from the STM32 family. Other key parts include the PRTR5V0U2X and XC6206PXXXMR-REGULATOR_LINEAR. By type, the board carries 48 diodes, 42 switches, 12 capacitors, 5 resistors, 3 ICs and 2 connectors.

It belongs with the keyboards designs in this gallery.

From the project

Le Chiffre keyboard pcb with stm32F072

Open sourced PCB originally design by tominabox1 updated to STM32 MCU.

To flash initially using dfu-util or qmk toolbox, plug in the board or push the reset button while DFU button is held down.

Le Chiffre STM32, from the project README
From the project README

Main components on the Le Chiffre STM32

STM32F072CBT6PRTR5V0U2XXC6206PXXXMR-REGULATOR_LINEAR

Le Chiffre STM32 bill of materials (BOM)

115 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32F072CBT6
U1
1
PRTR5V0U2X
U2
1
XC6206PXXXMR-REGULATOR_LINEAR
XC6206PxxxMR-Regulator_Linear
U3
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
J1
1
CONN_01X03_FEMALE
Conn_01x03_Female
J101
1
ASMD1206-150
F1
1
JUMPER_2_OPEN
Jumper_2_Open
JP2
34
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +26
4
SW_Push
SW31, SW34, SW39, SW43
2
SW_Push
SW32, SW33
1
SW_Push
SW35
1
SKQGABE010
SW37
35
1N4148W
D1, D2, D3, D4, D5, D6, D7, D8 +27
2
1N4148W
D36, D37
11
SK6812MINI
D101, D102, D103, D104, D105, D106, D107, D108 +3
1
C33600
60R@100MHz
MELED Industrial
L1
9
100NF
100nF
C1, C2, C3, C4, C5, C7, C8, C9 +1
1
10UF
10uF
C6
2
1UF
1uF
C11, C12
2
5.1K
5.1k
R1, R2
Show 2 more
QtyPartRefs
1
10K
10k
R3
2
4.7K
4.7k
R4, R5

Le Chiffre STM32 design files

The KiCad project lives in the sporkus/le_chiffre_keyboard_stm32 repository on GitHub; these links point at the commit this page was built from.

Le Chiffre STM32: common questions

What microcontroller does the Le Chiffre STM32 use?

The Le Chiffre STM32 is built around the STM32F072CBT6, from the STM32 family.

How big is the Le Chiffre STM32 PCB?

The Le Chiffre STM32 measures 227.4 × 84.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Le Chiffre STM32?

115 components, from 22 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 Le Chiffre STM32 design files?

From the sporkus/le_chiffre_keyboard_stm32 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Le Chiffre STM32 design in my own project?

Yes, under the terms of its CERN-OHL-W-2.0 license, which sporkus chose for the repository.

Can I test firmware for the Le Chiffre STM32 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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