Engineeringness on MSN

How LEDs Work: The Tiny Lights Inside Everything You Use

This video explains how LEDs (Light Emitting Diodes) work and why they’ve become one of the most important components in ...
YouTube on MSN

VU meter DIY kit with LEDs | LM3915N-1 LED DRIVER

This time I bring an electronic kit for beginners, this is a very cheap and interesting device that displays audio levels ...