Hello

First, not sure I`m posting in the right section. If not, can admin. move my posting.

O.K, I need advice. I am looking for a Small Audio circuit, run off of a 6v -12v battery source. It has to have a USB connector so it can be programmed with audio, max. 2 min. playback length. The circuit should be able to connect to a speaker and have output sound level adjustment manually. It should also be able to be set to repeat play that audio file till turned off.

This circuit has to be Small in size. 2-3 inches. I would like to install it in a Remote Control Boat for sound effects.

If anyone knows of one that works for my needs, Please include a link to it in your reply.

Thank You for your Time and Help.

 

Here is a link to a small SD card player. The speaker output on on it will probably not be loud enough for your needs, so I have included a link to a small amplifier module, too:
Mini MP3 Player Module with Simplified Output Speaker MP3-TF-16P TF Micro SD Card U Disk for Arduino - AliExpress
DC 7-25V 2*40W Digital Power Amplifier Module CS8673E Stereo Audio Amplifier Module for Car Audio System - AliExpress

 

Thank You for your reply.
So if I understand this, the player module can have the audio file transferred into it via a computer / USB link. Also the Digital Amp can connect to the Player module to hear the audio.

Questions: 1) How do you adjust the Power Amp play back level? 2) Will the Amp work on a 6v main battery? OR upto 12v. R.C Boats commonly run on either 6v, 7.2v, 12v.

What kind of software do you need to transfer the Audio sample to the Player?

 

1. To adjust the playback level, you will need a 10Kohm preset potentiometer between the player output and the amplifier input.

2. The amplifier will work with a supply anywhere between 7V and 25V but that one is a stereo amplifier. You only need one sound channel so this may be a better choice. It also has a built-in volume control and works with a supply voltage from 3V - 12V.

3. The sound is recorded as a .wav file on an SD card. To change its contents, it will be un-plugged from the card reader on the player and then plugged into a computer SD card reader. If you save several audio files on the SD card, you can change which file to play, using your remote control. This is the URL for the manual for the DF player:

https://www.manualslib.com/manual/1731781/Dfrobot-Dfplayer-Mini.html