In this theory-based video, we combine our knowledge of tank circuits and diodes to create the simplest of radios - the crystal receiver! We'll look at the V-I characteristics of germanium and silicon, as well as the lead-sulphide crystal Galena. Derek also shows how to design an air core inductor to work in concert with a variable capacitor, which will act as a tuning device for our radio. Our diode will act as a detector, which recovers the audio signal and removes the RF component. This is a great beginner project, a lot of fun to put together, and a good opportunity to show off your build skills! Discuss the episode and ask Derek questions on the element14 Community! https://bit.ly/3QNKYMF Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: https://bit.ly/3tmdewv Visit the element14 Community for more great activities and free hardware: https://bit.ly/3q6YMpu Tech Spotlights: https://bit.ly/3qPrDhM RoadTest and Reviews: https://bit.ly/3pV5Bux Project14: https://bit.ly/31wbnJY #0:00 Welcome to DC to Daylight #0:54 1924 Radio #2:54 Schematic #4:55 Curve Tracer #6:17 Building It! #6:55 Air Core Inductor #10:33 Radio #13:27 Give Your Feedback #diode #diodecircuits #galena #radiofrequency