HardLabs

USB-to-UART-CH340g

adaptableCoder·USB-to-UART-CH340g-PCB·KiCAD Files/USB-to-UART.kicad_pcb

USB-to-UART-CH340g PCB layout, top view — open source board by adaptableCoder

About the USB-to-UART-CH340g PCB

USB-to-UART-CH340g is an open source PCB design by adaptableCoder, published on GitHub under the MIT license. It is a 2-layer board measuring 57.3 × 12 mm, with 21 components from 16 distinct parts.

Other key parts include the CH340G, USBLC6-2SC6 and SPX3819M5-L-3-3. By type, the board carries 8 capacitors, 3 ICs, 3 diodes, 3 resistors, 2 connectors and 1 crystal.

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

From the project

PCB design for USB-to-UART converter based on CH340G with a USB-A edge connector.

A compact USB-to-UART adapter based on the CH340G, implemented as a USB-A edge connector board. Fabrication files have been generated; board fabrication is pending.

This project implements a reliable USB-to-UART interface suitable for development, debugging, and embedded bring-up tasks. Unlike typical breakout boards, this design uses a USB-A edge connector, allowing direct insertion into a host USB port without a cable.

Main components on the USB-to-UART-CH340g

CH340GUSBLC6-2SC6SPX3819M5-L-3-3

USB-to-UART-CH340g bill of materials (BOM)

21 components, 16 distinct parts.

QtyPartRefs
1
CH340G
U1
1
USBLC6-2SC6
U2
1
SPX3819M5-L-3-3
U3
1
Crystal
Y1
1
USB_A_PCB_Edge_receptacle
J1
1
Conn_01x04_Pin
J3
1
Polyfuse_Small
F1
1
Power LED
D1
1
Rx_LED
D2
1
Tx_LED
D3
2
22pF
C1, C2
1
10nF
C3
2
10uF
C4, C6
2
100nF
C5, C8
1
1uF
C9
3
1k
R1, R2, R3

USB-to-UART-CH340g design files

The KiCad project lives in the adaptableCoder/USB-to-UART-CH340g-PCB repository on GitHub; these links point at the commit this page was built from.

USB-to-UART-CH340g: common questions

How big is the USB-to-UART-CH340g PCB?

The USB-to-UART-CH340g measures 57.3 × 12 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the USB-to-UART-CH340g?

21 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the USB-to-UART-CH340g design files?

From the adaptableCoder/USB-to-UART-CH340g-PCB 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-UART-CH340g design in my own project?

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

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