Board B — Guardian / Keyboard / Privacy
About the Board B — Guardian / Keyboard / Privacy
Board B — Guardian / Keyboard / Privacy is an open source STM32 PCB design by Alfredapp-hash, published on GitHub. It is a 6-layer board measuring 60 × 118 mm, with 22 components from 17 distinct parts.
Its main chip is the STM32H573, from the STM32 family. Other key parts include the SE051C2, RTC_BACKUP, HAPTIC, TRUSTBAR_DISP and MODEM_VBAT_SW. By type, the board carries 11 ICs, 6 diodes and 4 connectors.
It belongs with the keyboards designs in this gallery.
From the project
# Arkhe Relay One — Bench-Alpha Multi-Board Schematic Set
# Arkhe Relay One — Bench-Alpha Multi-Board Schematic Set
This directory contains the revised bench-alpha KiCad schematic sources for the Arkhe Relay One secure mobile-telephone reference platform.
Track schematic → prototype progress in checklist.md (repo structure, symbol audit, ERC, power, RF, BOM, layout, firmware, bring-up).
- erc-audit.md — ERC pre-fix audit (expected errors/warnings, per-board checks, net classes, run order); read before first formal ERC - footprint-assignment-a-b.md — Board A/B schematic→PCB footprint assignment + Update PCB workflow - footprint-assignment-f.md —…
Main components on the Board B — Guardian / Keyboard / Privacy
Board B — Guardian / Keyboard / Privacy bill of materials (BOM)
22 components, 17 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32H573 Guardian_STM32H573 STMicroelectronics | LQFP64_10x10 | U1 |
| 1 | SE051C2 SE051_Guardian NXP | HVQFN20_4x4 | U2 |
| 1 | RTC_BACKUP | SOIC-8 | U3 |
| 1 | HAPTIC | DFN-8_2x2 | U4 |
| 1 | TRUSTBAR_DISP | FPC_0.5mm_10P | U5 |
| 1 | MODEM_VBAT_SW | SOT23-6 | U6 |
| 1 | LR1121_RF_VDD_SW | SOT23-6 | U7 |
| 1 | WCN_VDD_SW | SOT23-6 | U8 |
| 1 | VANA_CAM_SW | SOT23-6 | U9 |
| 1 | MIC_VDD_SW | SOT23-6 | U10 |
| 1 | VANA_FRONT_CAM_SW | SOT23-6 | U11 |
| 1 | To_Board_A | B2B_0.5mm_40P | J1 |
| 1 | To_Board_C_Modem | B2B_0.8mm_30P | J2 |
| 1 | To_Board_D_Mesh | B2B_1.0mm_8P | J3 |
| 1 | To_Board_F_FrontPanel | FPC_0.5mm_22P | J4 |
| 1 | To_Board_F_FPC1552 | FPC_12P_0.5mm_Biometric | J_BIO1 |
| 6 | RED | LED_0603 | D1, D2, D3, D4, D5, D6 |
Board B — Guardian / Keyboard / Privacy design files
The KiCad project lives in the Alfredapp-hash/Guardian_One repository on GitHub; these links point at the commit this page was built from.
Board B — Guardian / Keyboard / Privacy: common questions
What microcontroller does the Board B — Guardian / Keyboard / Privacy use?
The Board B — Guardian / Keyboard / Privacy is built around the STM32H573, from the STM32 family.
How big is the Board B — Guardian / Keyboard / Privacy?
The Board B — Guardian / Keyboard / Privacy measures 60 × 118 mm, has 6 copper layers and is 1 mm thick.
How many components are on the Board B — Guardian / Keyboard / Privacy?
22 components, from 17 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 Board B — Guardian / Keyboard / Privacy design files?
From the Alfredapp-hash/Guardian_One 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 Board B — Guardian / Keyboard / Privacy design in my own project?
The repository has no license, so all rights stay with Alfredapp-hash. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Board B — Guardian / Keyboard / Privacy 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.
More boards in Guardian_One
Board F — Front Panel / Keyboard
76 × 46 mm16 parts4LNo license0
Board A — Compute Development Kit
60 × 118 mm11 parts8LNo license0
Board C — Cellular Isolation
36 × 60 mm9 parts6LNo license0
Board D — Mesh / LoRa / Wi-Fi / BT
34 × 60 mm8 parts6LNo license0
Board G — Battery / Power Entry
68 × 40 mm6 parts4LNo license0
Board E — Camera / Microphone
25 × 35 mm5 parts4LNo license0
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