USB-C (female) connector to DSUB9 RS232 (male) port. Supports bidirectional communication between modern USB-C devices and RS232 hardware. WCH CH340G: USB-to-UART bridge IC for reliable USB ...

Ultra Compact RS232 to TTL Converter with Male DB9 (3.3V to 5V). I built this to communicate to an LED sign I bought over ten years ago that still works great but has a traditional DB9 serial port ...