HardLabs

USB-to-RS232-INTERFACE

pitiee-9·USB-to-RS232-INTERFACE

USB-to-RS232-INTERFACE PCB layout, top view — open source board by pitiee-9

About the USB-to-RS232-INTERFACE PCB

USB-to-RS232-INTERFACE is an open source PCB design by pitiee-9, published on GitHub. It is a 2-layer board measuring 56 × 40 mm, with 13 components from 8 distinct parts.

Other key parts include the MAX232 and CH341T. By type, the board carries 9 capacitors, 2 ICs, 1 crystal and 1 connector.

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

From the project

A kicad small PCB project, consists of gerber files of the pcb board structure of USB-RS232

A KiCad hardware design for connecting a computer's USB port to a standard RS-232 serial device.

- CH341T (U2) for USB-to-UART conversion - MAX232 (U1) for UART-to-RS-232 level conversion - A USB Type-A receptacle (J2) for the host connection - A DE-9/DB9 socket (J1) for the RS-232 connection - A 12 MHz SMD crystal (X1) for the CH341T clock

The MAX232 charge-pump capacitors are routed to the converter's C1+, C1-, C2+, C2-, V+, and V- pins. The board also routes USB VBUS and ground between the USB interface and the serial circuitry.

Main components on the USB-to-RS232-INTERFACE

MAX232CH341T

USB-to-RS232-INTERFACE bill of materials (BOM)

13 components, 8 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MAX232
U1
1
CH341T
U2
1
12MHz
X1
1
USB
J2
2
20pF
C1, C2
1
4700pF
C3
1
0.1uF
C4
5
0.47uF
C5, C6, C7, C8, C9

USB-to-RS232-INTERFACE design files

The KiCad project lives in the pitiee-9/USB-to-RS232-INTERFACE repository on GitHub; these links point at the commit this page was built from.

USB-to-RS232-INTERFACE: common questions

How big is the USB-to-RS232-INTERFACE PCB?

The USB-to-RS232-INTERFACE measures 56 × 40 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the USB-to-RS232-INTERFACE?

13 components, from 8 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-RS232-INTERFACE design files?

From the pitiee-9/USB-to-RS232-INTERFACE 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-RS232-INTERFACE design in my own project?

The repository has no license, so all rights stay with pitiee-9. Use it as a reference, and ask the author before reusing the design.

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