HardLabs

Phalanx

rasch·phalanx·pcb/phalanx.kicad_pcb

Phalanx PCB layout, top view — open source STM32 board by rasch

About the Phalanx PCB

Phalanx is an open source STM32 PCB design by rasch, published on GitHub under the SHL-2.1 license. It is a 2-layer board measuring 187.2 × 77.2 mm, with 86 components from 22 distinct parts.

Its main chip is the STM32F072CBT6, from the STM32 family. Other key parts include the MCP1700T-3302E/TT and SRV05-4. By type, the board carries 32 diodes, 28 relays, 11 capacitors, 6 resistors, 3 ICs and 3 connectors.

It belongs with the keyboards designs in this gallery.

From the project

👾 28 key split keyboard

The [Phalanx] is a 4 × 3 + 2, ortholinear, staggered, split keyboard.

- Keyboard Maintainer: rasch - Hardware Supported: Phalanx 0.1.0 (stm32f072) - Hardware Availability: [phalanx]

Check out [the Phalanx releases page][releases] for the required files to get PCBs manufactured (plot.zip) and/or assembled (bom.csv and cpl.csv). For those with soldering abilities, an interactive BOM/CPL HTML file (ibom.html) is provided to aid with self-assembly.

Main components on the Phalanx

MCP1700T-3302E/TTSRV05-4STM32F072CBT6

Phalanx bill of materials (BOM)

86 components, 22 distinct parts.

QtyPartRefs
1
MCP1700T-3302E/TT
U1
1
SRV05-4
U2
1
STM32F072CBT6
U3
1
PDTC123JT,215
Q1
1
TYPE-C-31-M-12
J1
2
8P8C
J2, J3
1
500mA
F1
28
SW_KEY
K0_0, K0_1, K0_2, K0_3, K1_0, K1_1, K1_2, K1_3 +20
1
B3U-1000P
SW1
29
1N4148W
D0_0, D0_1, D0_2, D0_3, D1_0, D1_1, D1_2, D1_3 +21
1
SMF9.0CA
D1
1
RB060M-30TR
D2
1
LED
D4
3
1u
C1, C2, C11
1
10u
C3
1
4n7
C4
3
100n
C5, C6, C8
2
4u7
C7, C9
1
10n
C10
2
5k1
R1, R2
Show 2 more
QtyPartRefs
3
100k
R3, R4, R6
1
1k
R5

Phalanx design files

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

Phalanx: common questions

What microcontroller does the Phalanx use?

The Phalanx is built around the STM32F072CBT6, from the STM32 family.

How big is the Phalanx PCB?

The Phalanx measures 187.2 × 77.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Phalanx?

86 components, from 22 distinct parts. The full bill of materials is listed on this page.

Where can I download the Phalanx design files?

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

Can I use the Phalanx design in my own project?

It is published under SHL-2.1, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Phalanx 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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