GitHub - t52ta6ek/Simple-Motorola-Radio-Programming-Interface: A simple Motorola radio programming interface using the Pollin RS232-TTL converter kit and the addition of one diode.
www.doc-diy.net :: Compact RS232-TTL converter
ELV TTL - nach RS 232-Umsetzer, Komplettbausatz | ELV Elektronik | Bausätze | ELV Elektronik
RS232 Serial Port to TTL Digital Converter Module SIPEX SP3232EEN 5V , 2,95 €