While newer Arduinos and Arduino compatibles (including the Hackaday.io Trinket Pro. Superliminal Advertising!) either have a chip capable of USB or rely on a V-USB implementation, the old fogies o… ...

This set of microcontroller boards start around $25 and come in the smallest footprint made by Arduino, allowing you to build compact and portable devices that are more difficult to make with an Uno.

Using the Arduino microcontroller, we will explore some of the essential and useful electronic sensors (light, sound, motion, sonar, infrared, angle bending), powerful actuators (relays, motors, ...