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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.
I wonder how much more it would cost to just donate or throw away your printer every time it runs out of ink and buy a new one. Printers are sold at a major loss to lock you into their ink. It might be worth the expense to know your costing these pricks money.