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USB

sean618·MakerTiles·hardware/Boards/USB/v0.10/USB.kicad_pcb

USB PCB layout, top view — open source STM32 board by sean618
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About the USB PCB

USB is an open source STM32 PCB design by sean618, published on GitHub under the MIT license. It is a 4-layer board measuring 27 × 25 mm, with 29 components from 19 distinct parts.

Its main chip is the C8734, from the STM32 family. Other key parts include the USBLC6-2P6 and C81233. By type, the board carries 8 capacitors, 8 resistors, 5 connectors, 3 ICs, 2 transistors and 1 crystal.

It belongs with the sensors designs in this gallery.

From the project

Modular STM32 electronic-tile system: hardware, firmware, the MicroBus + Field Protocol stack, and a Python daemon.

MakerTiles is a system of modular, snap-together electronic tiles. Each tile is a small STM32-based board with a single job — a strip of LEDs, a joystick, a motor, a distance sensor, a screen, a speaker, and so on. Tiles connect on a shared bus, a USB tile bridges the bus to a PC, and a Python daemon on the PC discovers every connected tile and lets you read its inputs and drive its outputs.

Main components on the USB

USBLC6-2P6C8734C81233

USB bill of materials (BOM)

29 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
USBLC6-2P6
USBLC6-4SC6
STMicroelectronics
IC1
1
C8734
STM32F103C8T6
U1
1
C81233
ME6211C33M5G-N
U2
1
N_MOSFET
Q1
1
PMOS_2A
Q2
1
C252270
Crystal_16M_small
Y2
1
C5242199
01x06_2.54mm_Male
J1
1
C319148
USB_C_connector_16P
J2
1
C5142239
01x06_2.54mm_Female
J3
2
C262665
FFC_connector_16p_hinge_lock
J5, J6
1
USB v0.10
IGNORE1
1
DFLS230L-7
2ADiode_DFLS230L-7
Diodes Incorporated
D1
5
C23733
4.7uF
C1, C2, C5, C8, C9
1
C1525
0.1uF
C4
2
C1547
12pF
C6, C7
2
C25905
5.1K
R1, R2
1
10K
R3
4
C25133
75R
R4, R5, R6, R7
1
C25867
1.5K
R12

USB design files

The KiCad project lives in the sean618/MakerTiles repository on GitHub; these links point at the commit this page was built from.

USB: common questions

What microcontroller does the USB use?

The USB is built around the C8734, from the STM32 family.

How big is the USB PCB?

The USB measures 27 × 25 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the USB?

29 components, from 19 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 USB design files?

From the sean618/MakerTiles 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 USB design in my own project?

Yes, under the terms of its MIT license, which sean618 chose for the repository.

Can I test firmware for the USB 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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