Hi,

Everywhere I check, the arduino Uno's power pot is just listed as taking a "2.1mm plug", but every supplier I look at where I'm located (Japan) lists three dimensions (outer diameter, inner diameter, and length) for DC plugs, so I do not know which part to get. Looking at the pot it appears that 2.1mm refers to pole diameter, so I need to know the outer diameter as well. Over here, you can order any size you can imagine....

Unfortunately, I live out in the boondocks and I have to order online, so I don't have the option of simply going to the shop and trying them out.

If anyone knows the correct plug size including all three dimensions, it would make me very happy.

Thanks.