Abstract: During the last decade, the exponential growth of mobile devices and wireless services created a huge demand for radio frequency-based technologies. Meanwhile, the lighting industry has been ...

This time I bring an electronic kit for beginners, this is a very cheap and interesting device that displays audio levels into the LEDs just like any audio level bar indicator will do. It is simple ...

Abstract: Light pollution involves introducing a large amount of electromagnetic radiation in the visible range (from 380 nm to 760 nm) into the Earth's atmosphere. Its source is all electric lighting ...