Connector pinout and signal explanation

here are some of the most important for hobby use

LAN and PoE .

Audio .

USB connectors and USB to PS-2 convertor .

HDMI .

Video VGA connector .

7 and 13 pole car connector .

mouse and keyboard PS2 (mini-DIN) connector .

PS-2 and AT keyboard connector .

S-video and SCART connector .