Multi-function Radio, Bluetooth, MP3 With SD and USB Player to Be Used During the Tests in Your Electronics Work Bench

Characteristics of MP3 multi-function:

• Radio FM.
• Antenna input.
• Bluetooth.
• MP3 using SD or USB.
• Stereo output.
• Remote control.
• Display with segments in color with LED.
• Remote control
• Works with 9 up to 12 Volts.
• Aux input.

• Multi-function radio, bluetooth, MP3
• PAM 8403 amplifier with volume control.
• 7805 regulator.
• Heat sink for 7805.
• Antenna for FM radio.
• Knob for potentiometer of volume.
• Wires and alligators connectors.

During the electronic buildings tools are too much important. In case miss it, the stuffs could be more difficult to have success.

In my case, in many moments I build audio equipment, like amplifier. The best way to test is using an audio input. Sometimes I plug my MP3 player. But it is not a good way to do it. So I decided to create this equipment to make my life easy.

In addition, for this building I also include a small amplifier using PAM 8403. The circuit that I used has also a control of volume. It gives to me more flexibility, during all tests along the constructions.

The MP3 multi-function works with 12 Volts. But the PAM 8403 needs 5 Volts to work. In case of that, I added a 7805 with a heat sink in order to get the right voltage and keep it cold.

The PAM 8403 gives around 3 + 3 Watts of music power. Then, it is also able, just in case, to install a speaker directly.

All the circuit was installed inside a small wood case. As it is an equipment for tests, I designed it to be smaller. The voltage comes from my adjustable source, but you can also add a 9 Volt battery if necessary, or even an AC/DC inlet power supply. It is possible because the MP3 multi-function works fine with voltages between 7 and 12 Volts.