Arduino DSP Radio Receiver Part 2

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=rH-AGu_gOCQ

Project here: https://create.arduino.cc/projecthub/... • This is my design of a AM / FM / SW radio receiver with DSP technology. • This Arduino radio receiver has an attractive look and nice features using an inexpensive color TFT / Arduino and few componets and delivery surprisingly good performance. • It includes the indication of the frequency in large numbers in the style of vintage seven segments, two bargraphs for indicating the signal strength, selection of 7 BW filters for AM and 5 BW filters for FM, indication of the wavelength of the band, change of tune step, Stereo/Mono indication, 14 bands for coverage of LW / MW / SW / CB ranging from 150kHz-30MHz / commercial FM band 64-108MHz and 2 color scheme for the display. • I used the Arduino Nano (the Pro Mini or Uno should work too) to control the Si4730-D60 integrated circuit (see notes below). The Si4730 is a complete receiver with DSP (digital signal processing) technology, the same used in SDR receivers. • The Arduino sends the control commands to the Si4730-D60 via the I2C data interface. The graphical interface is made up of a 1.8in ST7735 color TFT display, via SPI data interface. • An external audio amplifier must be used to amplify the sound of this radio. One suggestion is to use the amplified speakers used on computers or any other amplifier that has a line input. • Another option is to assemble a simple DIY audio amplifier with the LM386 IC. See below a complete project of the audio amplifier that I assembled at home using the LM386. If you want a stereo amplifier, assemble 2 of these. • I wrote this code (sketch) in a simple way, allowing beginners (and advanced) to make their own modifications and customize the radio according to their needs. • As can be seen in the wiring diagram, it is not necessary to use bi-directional Logic Level Converter, making the circuit even simpler and the circuit will works perfectly without it. • Note that the antenna input circuit (RF front end) is very simple, I did not use an RF pre-amp (LNA) or even more elaborate LPF / BPF filters and even so the results were great and surprised me. Watch the videos demonstrating the operation.

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