Incredible project + write-up from Jason Allemann of JK Brickworks.
One project that had been on my to do list for a long time was to build a working printer using a single LEGO Mindstorms EV3 kit (31313). In addition to having basic printing capabilities, I also wanted an easy way to tell it what to print on the fly, without having to manually change the program. For that I added a touch sensor, essentially turning it into a telegraph machine, so that you can tap out a sequence of letters using Morse Code which it will then print.
I put together building instructions for it, which you can find along with the program file and more detailed information about how it works, down below.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.