this post was submitted on 13 Oct 2023
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all those "print where you want" gadgets that are on kickstarter are using an hacked hp printhead, so i guess it can be reverse engineered or there's an arduino/esp32 library
unfortunately, hp printheads are literally the worst quality and least reliable that you can find on the market in the history of inkjet printers (i don't think anyone ever made worse printheads than HP in any point of history)
edit: searching "HP 6602 printhead arduino" gives many interesting results. But still, an epson printer from the late 90s that has been kept in a humid barn for three decades would be more reliable than an hacked HP. They don't even work when new and in warranty!
HP HQ to Printer: DRINK A VERIFICATION CARTRIDGE
I noticed that you typed printhead there. Try a laser printer. It's a game changer... Unless you are doing photography prints.