2021-06-13

[public] 201K views, 10.7K likes, dislikes audio only

GreatScott!

Check out http://KiwiCo.com/GreatScott for 50% off your first month of ANY crate!

WARNING: Always check your local law if you want to transmit something with AM! Sending on certain frequencies and thus blocking other licensed transmitters can be illegal. So if you want to try it then make sure that the transmission power is super low. In my example the transmitter was only capable of sending over a distance of around 2-3m.

Previous video: /youtube/video/tLKsvHSADdw

Walkie-Talkie nRF24 video: /youtube/video/SZYwvvh6m-s

Walkie-Talkie RF Modules: /youtube/video/PKowvbnIxso

555 Timer video: /youtube/video/fLaexx-NMj8

Voice-over Microphone video: /youtube/video/ts-JqEVzvDo

Oscillator video: /youtube/video/eYVOdlK15Og

Facebook: https://www.facebook.com/greatscottlab

Twitter: https://twitter.com/GreatScottLab

Support me for more videos: https://www.patreon.com/GreatScott?ty=h

More project information (pictures,.....) on Instructables: https://www.instructables.com/Simple-AM-Radio-Transmitter-Receiver/

Parts list: (affiliate links)

555 Timer: https://s.click.aliexpress.com/e/_dTrUY9D

Resistors: https://s.click.aliexpress.com/e/_dTPpXjt

Capacitors: https://s.click.aliexpress.com/e/_dU4FEsB

NE5532 OpAmp: https://s.click.aliexpress.com/e/_9JNpe3

Electret Mic: https://s.click.aliexpress.com/e/_AAJ0er

Perfboard: https://s.click.aliexpress.com/e/_AZXOgT

PCB Terminal: https://s.click.aliexpress.com/e/_dYbstfZ

XR2206 Function Generator: https://s.click.aliexpress.com/e/_Abhz51

TA7642 IC: https://s.click.aliexpress.com/e/_Adpjwb

100pF variable capacitor: https://s.click.aliexpress.com/e/_An8vVt

Enamelled copper wire: https://s.click.aliexpress.com/e/_9i1Heb

In this project we will keep it simple when it comes to wireless audio communication. Instead of trying to use an nRF24 or RF modules, we will go back to the old days in which they used AM radios. I will show you how such amplitude modulation works and along the way show you how to build a super simple AM transmitter and receiver. Let's get started!

Thanks to KiWiCo for sponsoring this video.

Music:

2011 Lookalike by Bartlebeats

0:00 "Complicated" Wireless Audio

0:45 Simple AM Radio Solution

1:59 Intro

2:09 Theory AM

3:19 Transmitter AM 555 Timer (sounds terrible)

6:08 Transmitter AM XR2206 IC (sounds decent)

7:25 Receiver AM TA7642

9:53 KiWiCo Sponsor