Category Archives: thermal receipt printer

Celebrating The Infinity Of Pi Day With Thermochromic Foil

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Thermal printer with a loop of thermochromic foil inserted in it, printing digits of Pi on the loop.The digits gradually disappear from the foil as it exits the printer.

It might take you some time to understand what’s happening in the video that Hackaday alum [Moritz Sivers] shared with us. This is {Moritz]’s contribution for this year’s Pi Day …read more Continue reading Celebrating The Infinity Of Pi Day With Thermochromic Foil→

Purely Functional Selfies: Thermal Printer Speaks Haskell

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[Dan] recently got a cheap POS thermal printer to chooch remotely over ESP32. Having conquered that project, he decided to see what else he could get the printer to do. Why not use it to print pictures? Sure, it’s been done, but not with Haskell. And yeah, the pictures will be grainy and weird-ish and limited to black and white, but hey, we love black and white around here as much as the idea of doing something simply because you can.

In the first project, [Dan] had to figure out how to talk to the printer since the RS422 …read more

Continue reading Purely Functional Selfies: Thermal Printer Speaks Haskell→