Introduction: Simple AM Radio Transmitter & Receiver
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!
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.
Step 1: Watch the Video!
The video will give you all the information you need to create your own AM radio transmitter & receiver. During the next steps though I will present you some additional information.
Step 2: Order Your Parts!
Here you can find a parts list with example seller (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
Step 3: Create the Circuits!
Here you can find the schematics for the circuits. Use them as a reference.
Step 4: Success!
You did it! You just created your own AM radio transmitter and receiver!
Feel free to check out my YouTube channel for more awesome projects: http://www.youtube.com/user/greatscottlab
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