What is the small barrel type connector called?
What is the small barrel type connector called.


It's called a barrel connector with a different diameter.

Typically I see these connectors specified in 0.1 mm increments.


  My original one has a yellow ring around it, Is that an indicator of what type it is?


Within one particular vendor's product line, it may be. But you might find a compatible connector from another vendor with a different color.