D Sub

D‑sub connectors are a long‑standing solution for serial communication, offering a sturdy mechanical design and a range of pin counts that suit everything from simple point‑to‑point links to more complex data buses. A typical 9‑pin (DE9/DB9) version can be fitted as a right‑angle or straight‑through component, with standard PCB footprints that make panel‑mounting straightforward and reliable.

Breakout boards translate the D‑sub interface to a 0.1 in (2.54 mm) spaced header, exposing each pin for easy prototyping and integration with breadboards or perf‑boards. Level‑shifter modules convert RS‑232 voltage swings to TTL logic levels, allowing microcontrollers to talk directly to computers, vehicle ECUs or other legacy equipment. These parts are valued for their compatibility, robust construction and the simplicity they bring to wiring and debugging in embedded, automation and diagnostic projects.