When using anything less than 5V you can only play from a SDCard and not from a USB key. You need to bypass the voltage regulator and solder a connector directly to the unit (I solder it right across the filter capacitor for the voltage regulator) to be able to run it off 18650 (it needs a minimum of about 3.8V to run). The very cheap “DIY bluetooth car mp3 player/radio with remote” made by Kebidu and sold on aliexpress (bought 4 of them at around 3 dollar each) actually does most of what you are looking for, the most important of which is that it remembers where you were when you stop/power off the device. Bluetooth for car connections (FM transmit too would be icing on the cake).Ī homebrew MP3 player can have all these missing features, plus you might even be able to sell it – at least until the Chinese copy it and put you out of business :-( Also, removable batteries help eliminate planned obsolescence. * Removable batteries like rechargeable AA’s or beefy 18650’s. Some other things that would be nice in a long format MP3 player: * Mono/Stereo selector so only one ear-bud or speaker is needed. ![]() Unfortunately all the small stand-alone MP3 players I see these days are crippled when it comes to long format content because of one missing feature – no non-volatile bookmarks that work across SD cards. These small stand-alone MP3 players should be great for listening to long format content like audiobooks and podcasts, they can have long battery life so you’re not running down your phone when you are biking or on public transport, plus they are cheaper, smaller, lighter, and less fragile than a phone. Posted in digital audio hacks, Portable Audio Hacks Tagged arduino pro mini, DFRobot, FAT16, FAT32, mp3, soundcloud, TP4056 Post navigation While you’re here, take a look at some of our other MP3 projects. also introduces users to the U8g2 display library which he says is a bit more feature-rich than the common Adafruit SSD1306 library. There’s even a small Python GUI to help you get your new player up and running. With the hardware sorted, all you’ve got to do is flash the firmware and load up an SD card with some MP3s. ![]() does a good job walking readers through the build making it fairly easy to remix, reuse, and reshare. It can even play ads in between songs, should you want such a thing.Ĭontrolling the DFPlayer module is easy using serial commands from a microcontroller, making it a convenient subsystem in bigger projects, and a potential alternative to the popular VLSI chips or the hard to come by WT2003S IC. This tiny module comes packed with a ton of interesting capabilities such as EQ adjustment, volume control, and a 3 watt amplifier amongst other things. ![]() When saw DFRobot’s DFPlayer module, he decided he wanted to make his own retro MP3 player.
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