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iFixit wants to fix the soldering iron
(www.engadget.com)
This is a most excellent place for technology news and articles.
Owner of 2 pinecils here, there are buttons and a display that shows the current temperature and other stuff. I only just learned that there's an app, it works more than fine on its own, out of the box.
I got that specific iron because I needed to power it from 12v, and it works very well on the USB PD power supply I already have for my laptop.
That's good to know. I'd quite like to have a soldering iron that I can run from an 18v power tool battery actually.
https://wiki.pine64.org/wiki/Pinecil_Power_Supplies#Tool_Batteries_18V-21V