I gave my typewriter computer some big upgrades

Published at : 23 Dec 2025

I've made some progress turning my typewriter into a computer, and now I can print much larger ASCII art using it! I added software flow control, and added code to process escape sequences to use the typewriter's formatting features.

I got a Brother AX-25 electronic typewriter from the 80s a few weeks ago, and I've been working on modernizing it with an Arduino and a Raspberry Pi. The Arduino controls two multiplexers that emulate the typewriter's keyboard, and the Arduino is hooked up to a Raspberry Pi over serial. This lets me use my typewriter as a Linux terminal, or as a teletype.

Check out my first video if you want to see how it works: https://www.youtube.com/watch?v=JvhT_Bru0AA

Source code: https://github.com/artillect/serial-typewriter

Chat with me on Discord: https://discord.com/invite/NxEQNwrQWt

Follow me on twitter: https://twitter.com/ArtillectYT

Chapters:
0:00 Intro
0:37 Updates
2:11 New features
2:53 Printing the Mona Lisa

#arduino #raspberrypi #typewriting #linux