Step 1: COMPONENTS

Arduino Uno or Arduino Standalone
Philips hue TEA 5767 FM Module for Arduino
STMicroelectronics TDA7297 amplifier Dual-Channel AC/DC 12V
Real Time Clock (RTC)
Display LCD 20 x04 with module I2C
Linear Regulator (7805)
diode 1N4007
Button switch 6
LED
Resistor 220 ohm
Jack Stereo female
wires
1 electrical junction boxes 120 x 80 x 50 mm
2 electrical junction boxes 100 x 100 x 50 mm

Step 2: TEA 5767

The "TEA 5767" card, purchased for a few € on Aliexpress, carries out most of the work, is connected to Arduino to pin A4, A5 (protocol I2c) and a Stereo TDA 7297 amplifier.

The TEA 5767 is very small and I had to do a lot of effort to fit a card with a thousand holes

Step 3: Scheme

I took a lot of inspiration from the project "erik12892" but I also made several changes.

In addition to the P1, P2, P3, P4 buttons on the Alarm Clock, I have added 2 more than I need:

• P5 to change stored stations, I have only entered 4, but you can increase, it by changing the code a bit

• P6 since the TEA 5767 card consumes very little current, has been used to turn the radio on or off via Arduino, in order to use an auxiliary input (mp3, phone, etc.)

To change the radio frequency, use the buttons P2 = More, and P3 = Less.

To stay low with the measurements, I built an Arduino Standalone.

I enclose the electrical diagram, the Fritzing scheme and the PCB drawn in EXCEL.

Step 4: Construction

As with many of my designs,I used the electrical junction boxes, there are different sizes and shapes, I used a 120 x 80 x 50 mm for the container and two 100 x 100 x 50 mm for the speakers.

The speakers were recovered from an old cathode-ray monitor The 3 boxes have been joined by cable glands and M3 screws.

Step 5: Test

Before building the PCB, and putting it all in the box, I did several tests with the prototype chopping board.

Step 6: Assembling

Three wires were welded to the amplifier to be connected to the TEA 5767 to respective L, R, and GRD

Arduino, TEA5767, Amplifier, Buttons, and Display, everything was assembled as from attached pictures. As an antenna I used an electric wire up to 30 centimeters