# Thermal Receipt Printers https://tinyprinter.club/ ## Printing garbage?! At first I suspected some crossed signals in my hastily-soldered perma-proto board. This turned out to be almost correct: it seems the Pi wants the serial printer to be on dedicated pins, including the ground pin. No sharing with the display! (Not sure which ground pin the display uses, but it's probably as many as possible?) Bonus thing I learned: the printer actually works much better when it's connected to a dedicated 9V power supply! It's a much clearer image, even when the line is full pixels (I figured out how to print `\xdb`, a big block in Nano's concept of extended-ascii).