Topic

radio

4 videos. Ranked by independent recommendations, not by views.

1. 

   1 Amplitude Modulation tutorial and AM radio transmitter circuit

   Afrotechmods 6 people · 6 months · since Jan 2013

   Explains amplitude modulation and builds a simple op-amp AM transmitter; the circuit is widely copied, and people often ask how its mixer stage really works.

2. 

   2 Weekend Projects - Raspberry Pirate Radio

   Make: 4 people · 4 months · since Mar 2014

   A Raspberry Pi pirate radio demo, linked as inspiration and a starting point for turning a Pi into an FM transmitter.

3. 

   3 The Superheterodyne Radio: No really, that's its name

   Technology Connections 4 people · 3 months · since Apr 2020

   An explanation of heterodyning and intermediate frequencies in radio receivers, recommended as a clear introduction, with an audible demonstration of beat frequencies.

4. 

   4 Defcon 18 - Practical Cellphone Spying - Chris Paget - Part.mov

   killab66661 3 people · 3 months · since Dec 2012

   Linked as a clear explanation of how GSM mobile phone traffic can be intercepted, offered as background rather than a build guide.