IC – CH330N – USB to UART converter

The CH330 is a USB to serial chip makes conversion now much more affordable as you don’t need any crystals as it comes with built-in crystal oscillator, only requires 2 caps, and supports baud rate from 50 bps to 2 Mbps.

Basic schematic:

Schematic from datasheet with MAX232:

CH330 datasheet (whc)