Here is another piece of mind-blowingly awesome technology known as Teensy. The Teensy board is a complete USB-based microcontroller development system, in a very small footprint., capable of implementing many types of projects. Explore a vast collection of products from brand Teensy 4.0, 4.1,3.6, 3.5, and many more. Each board offers a different amount of computing power, pins, hardware peripherals, and performance specs. All programming is done via the USB port.