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A Digital FM Receiver with Arduino

Hesambook

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FM transmitters/receivers are among the top favorite circuits of any electronic enthusiast. In this article/video, I have introduced a complete digital FM receiver design that has equipped with an LCD screen and three push-buttons. It can search for the FM signals from 76MHz to 108MHz manually and automatically (Scan mode). The signal strength is also displayed as a bar graph on the LCD screen. The output sound is amplified by a 3W+3W Class-D stereo amplifier that handles high-quality and strong enough audio power. As a controller, I have used the cheap and popular Arduino-Nano board. So let’s get started!


Fig-6.jpg


Fig-8.jpg


Fig-10.jpg


References

Article: https://bit.ly/3pQ7WoG

[1]: TEA5767 Datasheet: https://www.sparkfun.com/datasheets/Wireless/General/TEA5767.pdf

[2]: TEA5767 Schematic Symbol, PCB Footprint, and 3D Model: https://componentsearchengine.com/part-view/TEA5767HN/V3,118/Nexperia

[3]: PAM8403 Datasheet: https://www.mouser.com/datasheet/2/115/PAM8403-247318.pdf

[4]: PAM8403 Schematic Symbol, PCB Footprint, and 3D Model: https://componentsearchengine.com/part-view/PAM8403DR/LITTELFUSE

[5]: TS2937 Datasheet: https://www.mouser.com/datasheet/2/395/TS2937_D13-522475.pdf

[6]: TS2937 Schematic Symbol, PCB Footprint, and 3D Model: https://componentsearchengine.com/part-view/TS2937CW-5.0 RP/Taiwan Semiconductor

[7]: CAD Plugins: https://www.samacsys.com/library-loader-help
 

mariah1902

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I guess for this project you have spend a lot of money. These receivers can be bought with a really cheap price and spending this amount of money to buy a arduino is a foolish thing.
 

Hesambook

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I guess for this project you have spend a lot of money. These receivers can be bought with a really cheap price and spending this amount of money to buy a arduino is a foolish thing.
Not really. Foolish is not a nice term!

10PCs of PCB = 5.0USD
TEA5767 FM Module = around 4.5USd for 5PCs (less than 1.0USD each)
PAM8403 = Around 1.0USD
Discrete components: let's say 2.0USD
Arduino Nano = 0USD (I had one)
8*2 LCD = 1.2USD for 1PCs

Almost all electronic enthusiasts own at least one Arduino board. besides, learning practical concepts needs to do something in practice. majority of electronic projects here and there could be found as a product somewhere and since they get manufactured in high quantities, so they would be cheaper.
 
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