SparkFun MP3 Trigger, 18 Trigger Inputs, USB Connectivity, Even Volume Control, Full-Duplex Serial 3.5mm Audio Jack

Make some noise with your next project! The MP3 Trigger is a versatile, low-cost, low-power embedded audio unit that plays MP3 tracks directly from a FAT32 or FAT16 formatted microSD flash card to a stereo 1/8” (3.5mm) headphone output jack, supporting up to 192kbps stereo playback. The board has 18 external input pins that when pulled to ground, trigger pre-selected MP3 tracks, and a full-duplex serial control port that provides real-time volume control as well remote triggering for up to 255 tracks. There is also an on-board navigation switch for local access and playback of all MP3 tracks on the flash card. To get started with your MP3 Trigger, you'll need a few items not included. To begin, you'll need an microSD card on which to store your .mp3 files. A simple way to power the MP3 Trigger while you're familiarizing yourself with it is to use a 9V wall adapter. If you intend on using your MP3 Trigger with another serial device, you need an FTDI Basic or other serial connection. Last, you will need something though which to play audio. You may use headphones, a 3.5mm-to-3.5mm audio cable to connect to an external audio source, or one of our 3.5mm Audio pigtails to wire your MP3 Trigger to the output you desire.