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Man-in-the-Middle PCB Unlocks HP Ink Cartridges
(hackaday.com)
This is a most excellent place for technology news and articles.
Also, don't buy inkjet.
My first inkjet was an HP bubblejet, about 1994. My last was some garbage about 2000. Since then I've refused to own one.
My 1997 laserjet (that I bought used in 2008) just died. I bougt a color laser on Craigslist for $50. And my current BW laser is a 2014 HP, that just got it's second cartridge.
You can't give me an inkjet.
They actually make their money by having the printer be more expensive but it saves you in the long-run