Introduction: RDA5708 FM Radio With Arduino
A FM radio with RDS info and digital volume can be made with RDA5807 module, who is similar as TEA5767 (pcb board & pins).
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Step 1: Schematic & Description
This FM radio is made with:
- Arduino Uno board
- RDA5807 FM radio module
- 3 pushbuttons + 3 resistors (10kohms each)
- breadboard & shield
- more wires & USB cable
- PC speakers
Step 2: Bibliography
I found article http://full-chip.net/arduino-proekty/97-cifrovoy-... .
I tested this montage and is ok.. but I found base article is from http://seta43.hol.es/radiofm.html ...
Step 3: Tests
I test original sketch and I made some changes, first for a nice display for frequency bellow 100MHz.
In original sketch, 98.5MHz frequency is displayed 098.5MHz, after few changes value is displayed 98.5MHz, sketch is RDA5807_fmradio_3buttons_ver0.ino !
Second change is to store value for frequency and step volume in EEPROM memory, sketch is RDA5807_fmradio_3buttons_ver1.ino !
On display you can see:
- lelvel strengh signal
- if transmission is stereo or mono
- what you can made: AUTO SEARCH, INFO, MANUAL SEARCH & VOLUME
- RDS info (static and scrolling texts)
Step 4: Video Presentation
For finally version with last frequency of radio station and step volume stored in EEPROM memory of uC from Arduino board, see video from https://youtu.be/DEBSTJXznAw (updated sketch is RDA5807_fmradio_3buttons_ver1.ino)