HardLabs

USB Dongle

2sayle·USB_Dongle_KiCad

USB Dongle PCB layout, top view — open source STM32 board by 2sayle

About the USB Dongle PCB

USB Dongle is an open source STM32 PCB design by 2sayle, published on GitHub. It is a 6-layer board measuring 70 × 27 mm, with 56 components from 34 distinct parts.

Its main chip is the STM32F730R8Tx, from the STM32 family. Other key parts include the AMS1117-3.3, USB3343, USBULC6-2M6, ESDA14V2-2BF3 and CAT811TTBI-GT3. By type, the board carries 27 capacitors, 12 resistors, 6 ICs, 3 connectors, 2 crystals and 2 switches.

From the project

KiCad project to create a custom USB-C key with mass storage

KiCad project to create a custom USB-C key with mass storage and a microSD connector. Find all the KiCad schematics and layout files. Libraries containing custom footprints and symbols are available in ./Libraries folder.

- USB-C connector - USB 2.0 High Speed Interface (through ULPI) - STM32F730R8T microcontroller - MicroSD connector - Power LEDs - GPIOs for SWD (Serial Wire Debug)

USB Dongle, from the project README
From the project README

Main components on the USB Dongle

AMS1117-3.3USB3343USBULC6-2M6ESDA14V2-2BF3STM32F730R8TxCAT811TTBI-GT3

USB Dongle bill of materials (BOM)

56 components, 34 distinct parts.

QtyPartRefs
1
AMS1117-3.3
U1
1
USB3343
U2
1
USBULC6-2M6
U3
1
ESDA14V2-2BF3
U4
1
STM32F730R8Tx
U5
1
CAT811TTBI-GT3
U6
1
26 MHz
Y1
1
24MHz / 10pF / 20ppm
Y2
1
USB_C_Receptacle_USB2.0
J1
1
Conn SWD 02x05
J2
1
DM3BT-DSF-PEJS
J3
1
PCM12SMTR
SW1
1
KMR223G LFG
SW2
2
LED
D1, D2
2
120@100MHz
FB1, FB2
10
100n
C1, C10, C18, C19, C20, C21, C23, C24 +2
1
4.7u
C2
3
10u
C3, C16, C26
6
1u
C4, C5, C7, C8, C17, C22
1
22u
C6
Show 14 more
QtyPartRefs
1
100n
C9
1
2.2u
C11
2
10p
C12, C14
1
10n
C15
1
47n
C27
1
20k
R1
1
8.06k
R2
2
5.1k
R3, R4
1
200R
R5
1
22R
R6
1
1k
R7
3
10k
R8, R10, R11
1
4.7k
R9
1
2.2k
R12

USB Dongle design files

The KiCad project lives in the 2sayle/USB_Dongle_KiCad repository on GitHub; these links point at the commit this page was built from.

USB Dongle: common questions

What microcontroller does the USB Dongle use?

The USB Dongle is built around the STM32F730R8Tx, from the STM32 family.

How big is the USB Dongle PCB?

The USB Dongle measures 70 × 27 mm, has 6 copper layers and is 1.6 mm thick.

How many components are on the USB Dongle?

56 components, from 34 distinct parts. The full bill of materials is listed on this page.

Where can I download the USB Dongle design files?

From the 2sayle/USB_Dongle_KiCad repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the USB Dongle design in my own project?

The repository has no license, so all rights stay with 2sayle. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the USB Dongle 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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