Engineer Mahdi Sadaghdar’s short video experiments explain electronics in a fun and entertaining way. The videos cover basic and pragmatical aspects of working with electricity such as How to Make Proper Wire Connections, How 3D Printing Works and Definition of Voltage and Current. New and older video-tutorials can be accessed via the home page of his website, where each experiment is accompanied by a written explanation which sometimes includes figures and graphics. His YouTube channel recently reached 2 million subscribers and he celebrated this with the video Changing Signal into Pulses, where he designs a circuit to make his Telsacoil produce sounds with his voice.