PJRC Teensy

Teensy is a line of microcontroller development boards created by PJRC. They are designed to offer a high-performance yet low-cost platform for developing a wide range of projects, from simple tasks to complex USB-based applications. Teensy boards are notable for their compact size, extensive I/O capabilities, and support for a variety of programming languages and environments, including Arduino. They are popular among hobbyists, educators, and professionals for their versatility in electronics and embedded system projects.