HardLabs

USB-TO-EtherCAT-Adapter-Board

Sudeshpandit·USB-TO-EtherCAT-Adapter-Board·Final capstone project/USB to Ethercat Adapter Board V.1.0.kicad_pcb

USB-TO-EtherCAT-Adapter-Board layout, top view — open source STM32 board by Sudeshpandit

About the USB-TO-EtherCAT-Adapter-Board

USB-TO-EtherCAT-Adapter-Board is an open source STM32 PCB design by Sudeshpandit, published on GitHub. It is a 2-layer board measuring 61 × 53 mm, with 80 components from 31 distinct parts.

Its main chip is the STM32F411CEUx, from the STM32 family. Other key parts include the 24LC512, LAN9252I_ML and AMS1117-3.3. By type, the board carries 35 capacitors, 25 resistors, 5 inductors, 4 ICs, 4 connectors and 3 crystals.

It belongs with the usb & debug tools designs in this gallery.

From the project

Designed a 2-layer PCB that converts USB to EtherCAT for industrial network communication. Worked on the complete design flow — schematic design, component selection, PCB layout, and routing in KiCad. Ran DRC checks to ensure a clean, error-free design.

When I started, I barely knew how a PCB actually gets made — the first few days were confusing, and I kept hitting DRC errors without understanding why. Things started clicking as I worked through mistakes instead of just reading about them.

Over the internship I built up through 14 PCB projects, gaining hands-on experience with STM32 microcontrollers, SPI/I2C communication, and industrial protocols like EtherCAT — along the way strengthening my problem-solving (debugging DRC errors and routing conflicts), documentation, and the discipline of verifying a design before calling it done.

USB-TO-EtherCAT-Adapter-Board, from the project README
From the project README

Main components on the USB-TO-EtherCAT-Adapter-Board

STM32F411CEUx24LC512LAN9252I_MLAMS1117-3.3

USB-TO-EtherCAT-Adapter-Board bill of materials (BOM)

80 components, 31 distinct parts.

QtyPartRefs
1
STM32F411CEUx
U1
1
24LC512
U2
1
LAN9252I_ML
U4
1
AMS1117-3.3
U5
1
SF-3215-32.768KHZ
Y1
2
HC-49SMD-25Mhz Crystal
Y2, Y3
2
RJ45_Hanrun_HR911105A_Horizontal
J1, J2
1
USB_A
J3
1
Conn_01x04
J5
1
SW_Push
SW1
2
LED
D1, D3
1
ESD9B5.0ST5G
D2
1
FerriteBead 600R
FB1
4
BLM18EG221SN1D
FB2, FB3, FB4, FB5
2
12uF
C1, C2
4
12pF
C3, C4, C14, C15
1
2.2uF
C5
2
0.022uF
C6, C7
22
0.1uF
C8, C9, C10, C11, C12, C13, C18, C20 +14
1
10uF
C19
Show 11 more
QtyPartRefs
1
1uF
C25
1
0.1uF
C26
1
470pF
C28
8
49.9R
R1, R2, R3, R4, R5, R6, R7, R8
4
0R
R9, R11, R12, R13
3
10K
R10, R16, R17
3
200R
R14, R15, R23
1
220R
R18
3
4.7k
R19, R21, R22
1
12.1k
R20
2
10R
R24, R25

USB-TO-EtherCAT-Adapter-Board design files

The KiCad project lives in the Sudeshpandit/USB-TO-EtherCAT-Adapter-Board repository on GitHub; these links point at the commit this page was built from.

USB-TO-EtherCAT-Adapter-Board: common questions

What microcontroller does the USB-TO-EtherCAT-Adapter-Board use?

The USB-TO-EtherCAT-Adapter-Board is built around the STM32F411CEUx, from the STM32 family.

How big is the USB-TO-EtherCAT-Adapter-Board?

The USB-TO-EtherCAT-Adapter-Board measures 61 × 53 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the USB-TO-EtherCAT-Adapter-Board?

80 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the USB-TO-EtherCAT-Adapter-Board design files?

From the Sudeshpandit/USB-TO-EtherCAT-Adapter-Board 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-TO-EtherCAT-Adapter-Board design in my own project?

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

Can I test firmware for the USB-TO-EtherCAT-Adapter-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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