Dboard
About the Dboard PCB
Dboard is an open source STM32 PCB design by nnalyd, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 284.7 × 94.2 mm, with 282 components from 23 distinct parts.
Its main chip is the STM32G473CBTx, from the STM32 family. Other key parts include the AMS1117-3.3, SSAJ120100 and 74HC4067. By type, the board carries 143 capacitors, 65 resistors, 8 ICs, 2 inductors, 1 crystal and 1 connector.
It belongs with the keyboards and sensors designs in this gallery.
From the project
A custom 60% Hall Effect keyboard PCB powered by a STM32G473 and 16:1 analog multiplexing.
DBOARD is an open-hardware 60% mechanical keyboard PCB designed for Hall Effect (HE) magnetic switches. Unlike traditional contact-based PCBs, this board functions as a high-speed sensor array, utilizing continuous analog magnetic field measurements to determine key actuation.
Mux Select Pins: PA9, PA8, PB14, PB15 ADC Input Pins: ADC12IN1, ADC12IN2, ADC3IN5, ADC4IN3
Main components on the Dboard
Dboard bill of materials (BOM)
282 components, 23 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32G473CBTx | LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U2 |
| 1 | SSAJ120100 | SSAJ120100 | U3 |
| 5 | 74HC4067 | TSSOP-24_4.4x7.8mm_P0.65mm | U4, U5, U6, U7, U8 |
| 1 | 20Mhz | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | JST SH 4-pin | JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J1 |
| 61 | SLSS49E-3 | SLSS49E-3 with MX holes 3 | HALL1, HALL2, HALL3, HALL4, HALL5, HALL6, HALL7, HALL8 +53 |
| 1 | SW_SPST_B3SL-1002P | SW_SPST_B3SL-1002P | SW1 |
| 1 | 600 @ 100Mhz | L_0603_1608Metric | FB1 |
| 1 | 120R @ 100MHz | L_0805_2012Metric | FB2 |
| 127 | 100n | C_0402_1005Metric | C1, C2, C10, C12, C18, C19, C20, C21 +119 |
| 1 | 4u7/10v | C_0402_1005Metric | C3 |
| 2 | 10nf/10v | C_0402_1005Metric | C4, C7 |
| 2 | 1uf/10v | C_0402_1005Metric | C5, C6 |
| 5 | 100nf | C_0402_1005Metric | C8, C9, C11, C17, C143 |
| 2 | 33pf | C_0402_1005Metric | C13, C14 |
| 1 | 10u | C_1206_3216Metric | C15 |
| 1 | 100u | C_1206_3216Metric | C16 |
| 2 | 2u2 | C_0805_2012Metric | C23, C142 |
| 61 | 10k | R_0402_1005Metric | R1, R4, R5, R6, R7, R8, R9, R10 +53 |
Show 3 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 270 | R_0402_1005Metric | R2 |
| 1 | 10K | R_0603_1608Metric | R3 |
| 2 | 1 | R_1206_3216Metric | R64, R65 |
Dboard design files
The KiCad project lives in the nnalyd/dboard_pcb repository on GitHub; these links point at the commit this page was built from.
- Layouthardware/keyboard.kicad_pcb
- Schematichardware/keyboard.kicad_sch
Dboard: common questions
What microcontroller does the Dboard use?
The Dboard is built around the STM32G473CBTx, from the STM32 family.
How big is the Dboard PCB?
The Dboard measures 284.7 × 94.2 mm, has 4 copper layers and is 1.61668 mm thick.
How many components are on the Dboard?
282 components, from 23 distinct parts. The full bill of materials is listed on this page.
Where can I download the Dboard design files?
From the nnalyd/dboard_pcb repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Dboard design in my own project?
Yes, under the terms of its GPL-3.0 license, which nnalyd chose for the repository.
Can I test firmware for the Dboard 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.
Similar boards
STM32LumenPnP Motherboard
opulo-inc
149 × 95 mm296 parts4LCC-BY-SA-4.03.7k
STM32AxxSolder
AxxAxx
39 × 82.5 mm122 parts2LGPL-3.01.7k
STM32LibreVNA
jankae
122 × 98 mm592 parts6LGPL-3.01.6k
STM32AIOC
skuep
21 × 31.5 mm47 parts2LMIT1.4k
STM32Ferris
pierrechevalier83
208.8 × 86.8 mm102 parts2LSHL-2.11.3k
STM32176 pin board
rusefi
61.8 × 73.2 mm76 parts2LGPL-3.01.2k