Nice Arduino TEA5767 FM Radio With 3D Printed Parts

Another radio with TEA5767. Nice design and STL files for 3D printed parts to be downloaded. Presets or manual searching stations.

Arduino UNO R3 link

Momentary 12 mm push button (2) link

Battery Li-ION 18650 3.6 V (2) link

Case for 2 batteries link

Switch SPST ON-OFF link

Amplifier TDA2822M link

Resistor 10K (2)

Module LCD1602 16x2 with I2C integrated link

Module radio FM TEA5767 link

Cable 3.5 jack male to male link

Assorted wood screws and M3 screws

Assorted DuPont wires

Speakers 2” (2) link

(3D printer)

These are the parts to be printed. ONLY the .stl parts are required. Yoy may choose the colors you prefer,

Also file in Fusion format is provided, if you want to make modifications to the design.

Wiring is really very simple.

Connect positive of battery to switch SPST, and then to Vin of Arduino.

Connect +5 V output of Arduino to all Vcc of elements (display, amplifier, TEA5767).

SCL and SDA of Arduino to SCL and SDA of TEA 5767.

Speakers to amplifier, and jack from amplifier to TEA5767.

Connect analog output A4 y A5 to SCL and SDA of LCD display.

Connect both push buttons and resistors in a "pull-up" with digital inputs D2 and D3. Give them ground and Vcc.

The radio program allows for two operating modes. The first is with preselected stations. For this, you can overwrite the main FM stations of your city modifying some variables inside the program (in my case, these are the stations of the city of Zaragoza, Spain). It is easy to modify in the firts lines of the program.

When the radio is turned on, it operates in this mode (preset stations), and each press of the buttons changes the frequency according to these variables and displays the name and frequency on the LCD screen. By pressing both buttons simultaneously, the tuning mode switches to increments or decrements of 0.1 MHz, which are shown on the screen. Pressing again both at the same time, changes to preselected stations again.

So, with only two buttons, you may can have preselected main stations in your city, and manual mode.