Sound box

Sound Box

InnoGreenTech

DFplayer mini

Hello everyone, today i would like to introduce to you my sound box innogreentech. It allows to read mp3 message with random method. The playing is starting by a button or a LDR that detect the luminosity.

To make this sound box, i have used Arduino Nano and a DFplayer mini. It can read mp3 files record on a SD card. It can be connecting on a speaker of 8 ohms, and it can product 3 watts.

The dimensioning of the sound box InnoGreenTech are 50x50x20 mm, It is small to help its integration. There is a speaker in the box, but it is possible to connect a external speaker to improve the sound. Before this you need to disconnect the internal speaker.

A terminal screw allow to connect the power, the voltage need to be between 5 an 9 volts. Also, it is possible to power it by USB connector.

When i have made the sound box, i had a problem of a big noise, I found anything on the web that works correctly. After a lot tests i have found a solution that release completely the problem. You will discover solution in this video that introduce the sound box of innogreentech.

Summary

Parts to make sound box
Drawing and PCB
The box

Parts to make sound box

At heart of this project there is a DFplayer mini. It can read mp3 and the sound quality is good if you use a good speaker. it can provide 3 watts, it is often suffisant at a lot project.

The DFplayer can be use with different mode. It is possible to drive it with buttons or a serial interface. Ici vous trouverez sa documentation.

To drive DFplayer i have use this library . It allows to control level, equalizer, play, pause,...

gestionnaire


The Arduino nano allows to lead the random play. A analog input can detect luminosity by a LDR., a another one allow to improve random functionality.	The DFplayer can read MP3 files easily with a serial interface. It can provide 3 watts that allow to use it alone.

This speaker of 1 watt and 8 ohms is integrate in the box, this little size allow to reduce the sound box. The sound quality of this speaker is low you can improve it with a external speaker by a terminal screw.	A micro switch of 6mm is use to start playing.

A LDR, measure the level of luminosity, this allow to start the player when the light is detect.	We need a resistor of 4,7 K for the LDR and one of 1K at add on the TX line.

A power switch allow to disconnect the object to preserve the battery.	4 terminals screw are necessary, they have a step of 3,81 mm.