AC induction motors are everywhere, from ceiling fans to vehicles. They’re reliable, simple, and rugged — but there are some disadvantages. It’s difficult to control the speed ...

Discover how to create a compact vertical-axis wind turbine with everyday materials in this detailed step-by-step guide. Watch as we build composite turbine blades, assemble a helical rotor, and ...

Abstract: We propose a method for measuring the instantaneous velocity of moving objects using ultrasonic waves. By transmitting and receiving a single dual-chirp pulse, composed of an up-chirp and a ...

With this circuit it is possible to program the on and off time of our propulsion system, in this case a simple dc motor for ...