[SP3TYF] has a HyGain AR-303 rotator and decided to build an Arduino-based controller for ... If you want to work satellites, you need an additional rotation axis. And if you think about it ...

This tutorial will guide you through the process of building a tachometer around an Arduino. Tachometers are used to measure rotation rate ... to use a reflectance sensor which allows to for ...

CIT's Jet Propulsion Laboratory and Spectral Sensor Solutions, all in the U.S., is proposing the possibility of generating electricity using energy from the rotation of the Earth. In their study ...