USB to Serial Converter
About the USB to Serial Converter PCB
USB to Serial Converter is an open source ESP32 PCB design by mauroxf, published on GitHub under the MIT license. It is a 2-layer board measuring 25 × 40 mm, with 11 components from 9 distinct parts.
Its main chip is the ESP32-WROOM-32E, from the ESP32 family. Other key parts include the CH340C and C6186. By type, the board carries 4 resistors, 3 ICs, 2 capacitors, 1 connector and 1 diode.
It belongs with the usb & debug tools and displays & leds designs in this gallery.
From the project
KiCad projects that I did not send out for printing but demonstrate all relevant skills in my learning process
KiCad Mini Projects is a growing collection of hardware PCB designs built entirely in KiCad. Each project is fully completed through all stages of the PCB design cycle — including schematic capture, PCB layout, 3D rendering, and BOM generation.
- Build professional PCB designs in KiCad - Practice embedded and analog layout skills - Demonstrate ability to complete full design cycles - Showcase experience for hardware/embedded engineering positions
Main components on the USB to Serial Converter
USB to Serial Converter bill of materials (BOM)
11 components, 9 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CH340C | SOIC-16_3.9x9.9mm_P1.27mm | U1 |
| 1 | ESP32-WROOM-32E | ESP32-WROOM-32E | U2 |
| 1 | C6186 AMS1117-3.3 | SOT-223-3_TabPin2 | U3 |
| 1 | USB_C_Receptacle_USB2.0_16P | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
| 1 | C2286 RED | LED_0603_1608Metric | D1 |
| 2 | C19702 10uF | C_0603_1608Metric | C1, C2 |
| 2 | C23186 5.1k | R_0603_1608Metric | R1, R2 |
| 1 | C25804 10k | R_0603_1608Metric | R4 |
| 1 | C23186 470 | R_0603_1608Metric | R5 |
USB to Serial Converter design files
The KiCad project lives in the mauroxf/kicad-mini-projects repository on GitHub; these links point at the commit this page was built from.
USB to Serial Converter: common questions
What microcontroller does the USB to Serial Converter use?
The USB to Serial Converter is built around the ESP32-WROOM-32E, from the ESP32 family.
How big is the USB to Serial Converter PCB?
The USB to Serial Converter measures 25 × 40 mm, has 2 copper layers and is 1.600198 mm thick.
How many components are on the USB to Serial Converter?
11 components, from 9 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 to Serial Converter design files?
From the mauroxf/kicad-mini-projects 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 to Serial Converter design in my own project?
Yes, under the terms of its MIT license, which mauroxf chose for the repository.
Can I test firmware for the USB to Serial Converter without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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