Teensy 4.1 vs. Teensy 4.0 - Development Boards, Kits, Programmers - Electronic Component and Engineering Solution Forum - TechForum │ Digi-Key
Need help with level shifting board (going 3.3v to 5v) - General Electronics - Arduino Forum
Steep Motor 28BYJ-48 with Teensy 3.2 – EcoRosBot
GitHub - CloudHead84/Modbus-Stepper-Controller: Step/Dir Controller based on teensy. Acts as a Modbus tcp slave, so a modbus master is needed for the setup. the master will need a library issuing different commands