An inexpensive device for learning Morse Code, using STM32F103C "Blue Pill" microcontroller board, 2.2" ILI9341 TFT, and rotary encoder.
Inspired by "Morse Code Tutor" by Jack Purdum W8TEE.
Full description and 8-part tutorial available at w8bh.net
Folders in this project: "MorseTutor" contains the latest source code. "Tutorials" contains sketches for the 8-part tutorial. "Troubleshooting" has sketches for hardware validation (screen, encoder, etc). "Book texts" contains ASCII text for a few classic books. Put them on your SD card for code practice.
https://github.com/bhall66/morse-tutor
https://github.com/km4nfq/DIY-Brass-Dual-Lever-Paddle/blob/main/w8bh-morse-tutor-build-notes.pdf