2 layers284.7 × 94.2 mm
2 layers302 × 114.6 mm
A58HE kb
xviee/A58HE1Hall effect 50% Alice-like keyboard
- Size
- 302 × 114.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 214
- Nets
- 119
- Pads
- 686
- Tracks, vias
- 1,432, 268
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 23 May 2025
- Updated
- 23 May 2025
Overview
A58HE kb is an open-source printed circuit board by xviee, from the xviee/A58HE repository on GitHub, published under the AGPL-3.0 licence. It is a 2-layer board of 302 × 114.6 mm with 214 parts on 119 nets, routed with 1,432 tracks and 268 vias.
It is built around the STM32F446RET6, OH49E-S and TLV75733PDBV, with the XC6206-2.8V, SN74LV4051AD and USBLC6-2SC6 among its other parts. Its parts include 79 capacitors, 57 switches, 3 resistors, 3 ICs and 1 diode. It belongs with the STM32 boards of this library.
Main components
7
STM32F446RET6
LQFP-64(10x10)-40℃~+85℃ 1.7V~3.6V 128KB 12bit 12bit 180MHz 32 Bit 50 512KB ARM Cortex-M4 Built-in FLASH LQFP-64(10x10) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
OH49E-S
SOT-23-20℃~+100℃ 2.5V~10V 2mV/Gs 4.2mA ±120mT SOT-23 Linear Hall Sensors ROHSNanjing Ouzhuo TechLinear Hall Sensors
TLV75733PDBV
SOT-23-5-40℃~+125℃@(Tj) 1 1A 3.3V 40uA 46dB@(100kHz) 5.5V 650mV@(1A) 71.5uVrms Fixed Positive Under Voltage Lockout、Over Current Protection、Over Temperature Protection、Soft Start SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
XC6206-2.8V
SOT-23-3L-40℃~+85℃@(Ta) 1 1uA 2.8V 250mA 350mV@(30mA) 6V Fixed Over Current Protection Positive SOT-23-3L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSYONGYUTAIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SN74LV4051AD
SOIC-16-40℃~+85℃ 1 22Ω 2V~5.5V 35MHz 600ps 8:1 SOIC-16 Analog Switches, Multiplexers ROHSTexas InstrumentsAnalog Switches, Multiplexers
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
X322516MLB4SI
SMD3225-4P-40℃~+85℃ 16MHz 50Ω 9pF Crystal Oscillator ±10ppm ±20ppm SMD3225-4P Crystals ROHSYXCCrystals
README
README.mdA58HE - Open Source 50% Alice-Like Analog Keyboard
Havent ordered pcb's yet due to it's whopping price of ~~$150.
With this project I'm trying to achieve making the first working ergo analog keyboard.
Made layout from using already exsisting kle.json of 40% alice keyboard and modifying it.
(for some unknown to me reason usb-c connector and some other things are not present on the render)
Keyboard layout
Disclaimer
This project is still work in progress. I dont know if prototypes will be in a working state, so please, do not try to order pcb's.I am not an electrical engineer and i have a little knowledge on hall effect keyboards theme, so my design is probably not working. If you want to create your own analog keyboard pcb, please be aware, that trying to reference my design will likely result in your pcb not working.
Features
- Features that libhmk firmware supports.
TODO
- Make some changes in pcb design
- Getting my pcb reviewed on r/PrintedCircuitBoard
- Order assembled pcb's
- Design the case
- Order case from aluminum
- Get this thing to work :3
Parts
214| Qty | Value | Footprint | References |
|---|---|---|---|
| 56 | 100n | Capacitor_SMD:C_0402_1005Metric | C24, C25, C26, C27, C28, C29, C30, C31, C32, C33, C34, C35, C36, C37, C38, C39 +40 |
| 56 | OH49E-S | Package_TO_SOT_SMD:SOT-23-3 | HS1, HS2, HS10, HS11, HS12, HS13, HS14, HS15, HS16, HS17, HS18, HS19, HS20, HS21, HS22, HS23 +40 |
| 49 | MountingHole | SW_MX_Lekker:SW_MX_Lekker | s1, s2, s11, s12, s13, s14, s15, s16, s17, s23, s24, s25, s26, s27, s28, s29 +33 |
| 14 | 100n | ScottoKeebs_Components:Capacitor_0402 | C1, C3, C4, C5, C6, C7, C9, C17, C18, C19, C20, C21, C22, C23 |
| 7 | SN74LV4051A | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | AM1, AM2, AM3, AM4, AM5, AM6, AM7 |
| 4 | MountingHole | SW_MX_Lekker:SW_MX_Lekker_1.25u | s19, s20, s21, s22 |
| 3 | 1u | ScottoKeebs_Components:Capacitor_0402 | C10, C11, C12 |
| 3 | 5.1k | ScottoKeebs_Components:Resistor_0402 | R1, R2, R3 |
| 2 | 10p | ScottoKeebs_Components:Capacitor_0402 | C13, C14 |
| 2 | 2.2u | ScottoKeebs_Components:Capacitor_0402 | C15, C16 |
| 2 | MountingHole | SW_MX_Lekker:SW_MX_Lekker_1.75u | s10, s18 |
| 1 | 10u | ScottoKeebs_Components:Capacitor_0402 | C8 |
| 1 | 4.7u | ScottoKeebs_Components:Capacitor_0402 | C2 |
| 1 | 500m | ScottoKeebs_Components:Fuse_0603 | F1 |
| 1 | MountingHole | SW_MX_Lekker:SW_MX_Lekker_1.5u | s7 |
| 1 | STM32F446RET6 | PCM_Package_QFP_AKL:LQFP-64_10x10mm_P0.5mm | U1 |
| 1 | SW_Push | ScottoKeebs_Components:Button_TL3342 | SW1 |
| 1 | TLV75733PDBV | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | USBLC6-2SC6 | PCM_Package_TO_SOT_SMD_AKL:SOT-23-6 | D1 |
| 1 | USB_C_Receptacle_USB2.0_14P | ScottoKeebs_Components:USB_C_HRO_TYPE-C-31-M-12 | J1 |
| 1 | X322516MLB4SI | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | XC6206 | Package_TO_SOT_SMD:SOT-23-3 | U2 |
The 209 most common of 214 parts.
Questions
How big is the A58HE kb PCB?
It measures 302 × 114.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the A58HE kb use?
214 parts, built around the STM32F446RET6, OH49E-S, TLV75733PDBV and XC6206-2.8V. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the A58HE kb KiCad files?
From the xviee/A58HE repository on GitHub, at the commit this page was made from: the board is pcb/A58HE-kb.kicad_pcb and its schematic pcb/A58HE-kb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the A58HE kb design in my own project?
Its repository publishes it under the AGPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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