[André Sarmento] needed to connect a computer to an RS-485 bus. A simple converter can be sourced online, but the only thing he could find locally that was even close was a USB to RS-232 converter.

This protocol is for a serial port device, but our USB receiver will ... A 3mm LED (LED1) and a 330ohm current limiting resistor (R2) show USB connection status. We used a TSOP-1738 infrared ...