Jaehan Gyopo

To partially answer my own question. The Arty S7 and Arty A7 reference an inner diameter of either 2.1 mm or 2.5 mm, but the Arty Z7 only references an inner diameter of 2.1 mm. Is that so about only 2.1 mm for the Arty Z7? I haven't found yet the outer diameter, but am assuming for the moment 5.5 mm. So I guess if I want a single power connector common for all three boards I should get a 5.5 mm / 2.1 mm power connector like this: https://www.amazon.com/dp/B071HB1589? If all three boards were to take either 2.1 mm or 2.5 mm, are there any downsides going with 2.5 mm over 2.1 mm, or vice versa? P.S. I am not affiliated in any way with PWR+, I just found that brand first on Amazon. There are probably cheaper and/or better power adapter alternatives.

I'm looking to buy a DC power supply for my Arty S7-50 and Arty A7-100T, and possibly an Arty Z7-20 too if I can get one. I'm hoping I can use the same one for all three boards. Any recommendations? What are the coaxial power connector's specifications (inner and outer diameters) so I can be certain I get one that will work? Say, something like this: https://www.amazon.com/dp/B003LRNRAY?

Looking to buy an Arty Z7-20 in like-new condition, message me if you're interested in selling yours and your price.