RS232/RS485 Converters

USB to Serial Converters Overview

Many times at work or while building projects, I found I needed a USB to RS232 or RS485 converter. I decided to build my own. Below are the designs I implemented. They are based on the FTDI FT232RL chip.

USB to Serial Converters Repository

USB to Serial Converters Pictures

USB to RS485 (Left) and USB to RS232 (Right) PCBs, Top View

USB to RS485 (Left) and USB to RS232 (Right) PCBs, Bottom View

Converter Enclosures

Complete Converter Kit

The USB to Serial Converter PCBs were designed using Express PCB.

USB to Serial Converter PCB Source

USB to RS-232 Schematic

USB to RS-232 PCB Design

USB to RS-232 PCB Top Layer

USB to RS-232 PCB Bottom Layer

USB to RS-232 PCB Power Layer

USB to RS-232 PCB Ground Layer

USB to RS-232 PCB Top, Bottom and Silkscreen Layer

The USB to Serial Enclosures were designed in Free CAD.

USB to Serial Enclosures Source

USB to RS-232 CAD Design

USB to RS-232 Enclosure

USB to RS-485 Schematic

USB to RS-485 PCB Design

USB to RS-485 PCB Top Layer

USB to RS-485 PCB Bottom Layer

USB to RS-485 PCB Power Layer

USB to RS-485 PCB Ground Layer

USB to RS-485 PCB Top, Bottom and Silkscreen Layer

USB to RS-485 CAD Design

USB to RS-485 Enclosure

USB to Serial Converters Instructions

Finally, an instruction card was made for the devices.

USB to Serial Instructions