DFPlayer Make your own mp3 player without using an Arduino no Arduino USB
http://www.banggood.com/DFPlayer-Mini...
Build your sound unit for scratch built toys...
https://www.instructables.com/id/Soun...
After I've uploaded the video that shows how I made the sound unit for my RC Lego BB8, I've had a few requests about what there is inside my "black box". I thought to shoot a video that shows that. While I was checking the wiring diagram of the DFPlayer, I've also realized this sound module has even the USB pins. Using a USB cable, properly wired (use the multimeter to check the polarity, otherwise you'll damage the USB of your PC), you don't have to remove the SD card every time you like to copy your favorite music/sounds... Check this out!