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 Pictures

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

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

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

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

Converter Enclosures

Converter Enclosures

 
Complete Converter Kit

Complete Converter Kit


USB to RS232 Schematic

USB to RS232 Schematic

USB to RS232 Schematic


USB to RS232 PCB Design

 
USB to RS232 PCB, Top Layer

USB to RS232 PCB, Top Layer

USB to RS232 PCB, Bottom Layer

USB to RS232 PCB, Bottom Layer

 
USB to RS232 PCB, Power Layer

USB to RS232 PCB, Power Layer

USB to RS232 PCB, Ground Layer

USB to RS232 PCB, Ground Layer

USB to RS232 Top, Bottom and Silkscreen Layers

USB to RS232 Top, Bottom and Silkscreen Layers


USB to RS232 CAD Enclosure

USB to RS232 Enclosure

USB to RS232 Enclosure


USB to RS485 Schematic

USB to RS485 Schematic

USB to RS485 Schematic


USB to RS485 PCB Design

 
USB to RS485 PCB, Top Layer

USB to RS485 PCB, Top Layer

USB to RS485 PCB, Bottom Layer

USB to RS485 PCB, Bottom Layer

 
USB to RS485 PCB, Power Layer

USB to RS485 PCB, Power Layer

USB to RS485 PCB, Ground Layer

USB to RS485 PCB, Ground Layer

USB to RS485 PCB Top, Bottom and Silkscreen Layers

USB to RS485 PCB Top, Bottom and Silkscreen Layers


USB to RS485 CAD Enclosure

USB to RS485 Enclosure

USB to RS485 Enclosure


USB to Serial Converters Instructions

Finally, an instruction card was made for the devices.

USB to Serial Instruction Sheet

USB to Serial Instruction Sheet