The Qwiic MP3 Trigger is user-friendly. When you connect a USB-C cable, the contents of the microSD card appear as a jump drive. This makes transferring MP3s a breeze, with no need for drivers or WAV or Vorbis conversion. The sound output is provided via a 3.5mm headphone jack or poke-home connector, allowing an external speaker to be connected without soldering. The speaker is boosted by a Class-D mono amplifier capable of outputting up to 1.4W, ensuring an impressive sound quality.
One of the key features of the Qwiic MP3 Trigger is its ability to play sound effects with the touch of a button. This is made possible by the four trigger pins. When pin 3 is pulled low, the T003.mp3 file will immediately be played. By pulling multiple pins down simultaneously, the four triggers can play up to ten tracks. A total of 255 tracks can be loaded onto the SD card and triggered via the I2C interface.
All settings, including volume, EQ, and I2C address, are stored in NVM and loaded at each power up. The I2C address of the Qwiic MP3 Trigger can be modified via a solder jumper or be assigned using a software command. You can even chain multiple Qwiic MP3 Triggers together on a single bus for simultaneous track mixing and triggering.
The SparkFun Qwiic MP3 Trigger is also compatible with an extensive Arduino library, making MP3 playing over I2C simple and straightforward. All the basic functions like play tracks, change volume, play next/previous, check if track is playing, stop play, change EQ, and change I2C address are all supported.
Note: This unit has the firmware updated to v1.2 to avoid the auto-loop bug of the previous version. All aspects of the board function identically but the 'Pause' command is no longer supported.
The SparkFun Qwiic Connect System is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.
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