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 ...

Light is fast, but travels in long wavelengths and interacts weakly with itself. The particles that make up matter are tiny ...

Manufacturer's 18m diameter CX System LED dome provides 100x the brightness of average planetariums for Dorrance DOME which ...