HardLabs

SDM-25 Wheel Board

sundevilmotorsports·pcb-dev·PRE2026/sdm25wheel/sdm25wheel.kicad_pcb

SDM-25 Wheel Board layout, top view — open source STM32 board by sundevilmotorsports

About the SDM-25 Wheel Board

SDM-25 Wheel Board is an open source STM32 PCB design by sundevilmotorsports, published on GitHub. It is a 4-layer board measuring 49 × 41 mm, with 53 components from 41 distinct parts.

Its main chip is the USBLC6-2SC6, from the STM32 family. Other key parts include the MIC37100-3.3WS, 24LC01BT-E/LT and SN65HVD230. By type, the board carries 21 capacitors, 13 resistors, 6 ICs, 6 diodes, 3 connectors and 2 jumpers.

From the project

PCB development repository

Main components on the SDM-25 Wheel Board

USBLC6-2SC6MIC37100-3.3WS24LC01BT-E/LTSN65HVD230

SDM-25 Wheel Board bill of materials (BOM)

53 components, 41 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
USBLC6-2SC6
STM32F405RGT6
U1
1
~
U2
1
MIC37100-3.3WS
U3
1
24LC01BT-E/LT
U4
1
SN65HVD230
U5
1
USBLC6-2SC6
U6
1
12MHz
Y1
1
JST-XH
J1
1
USB_B_Micro
J3
1
JST-XH
J4
1
BOOT
JP1
1
Bus Termination
JP2
1
GREEN
D1
1
TVS
D2
1
RED
D3
1
GREEN
D4
2
TVS
D5, D6
1
120R
FB1
2
100NF
10uF
C1, C3
3
1UF
100nF
C2, C4, C6
Show 21 more
QtyPartRefs
1
1UF
10pF
C5
2
4.7UF
100nF
C7, C8
1
100NF
10pF
C9
1
10UF
100nF
C10
2
2.2uF
C11, C13
5
100nF
C12, C15, C18, C19, C20
1
10uF
C14
2
1uF
C16, C17
1
1nF
C21
1
10K
220
R2
1
10k
R3
2
2.2K
2.7k
R4, R6
1
220
R5
1
22.1K
10k
R7
1
120
R8
1
47.5K
10k
R9
1
10K
10k
R10
1
300
R11
1
220
150
R12
1
5.05
1k
R13
1
10K
300
R14

SDM-25 Wheel Board design files

The KiCad project lives in the sundevilmotorsports/pcb-dev repository on GitHub; these links point at the commit this page was built from.

SDM-25 Wheel Board: common questions

What microcontroller does the SDM-25 Wheel Board use?

The SDM-25 Wheel Board is built around the USBLC6-2SC6, from the STM32 family.

How big is the SDM-25 Wheel Board?

The SDM-25 Wheel Board measures 49 × 41 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the SDM-25 Wheel Board?

53 components, from 41 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 SDM-25 Wheel Board design files?

From the sundevilmotorsports/pcb-dev 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 SDM-25 Wheel Board design in my own project?

The repository has no license, so all rights stay with sundevilmotorsports. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the SDM-25 Wheel Board 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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