SparkFun Qwiic MP3 Trigger

The Qwiic MP3 Trigger comes with a microB connector and the WT2003S MP3 decoder IC that gives you access to the files on the microSD card. Simply plug in the Qwiic MP3 Trigger and you’ll be transferring MP3's, with no need for drivers and no need for WAV or Vorbis conversions. Sound output is provided via a 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.



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. Multiple Qwiic MP3 Triggers can be chained together on a single bus allowing for simultaneous track mixing and triggering.

Product Video

Quick Spec

• Operating voltage: 3.3V
• Current consumption:
• 40mA standy
• 40mA when playing over headphones at any volume level
• 150mA-300mA when driving external 8Ω speaker at full volume setting
• Volume, EQ setting, and I2C address settings stored in non-volatile memory and loaded at each power-on
• WT2003S MP3 decoder IC provides USB access to microSD socket (up to 32GB) and MP3 decoding
• ATtiny84 receives I2C commands and controls the MP3 decoder
• Poke-home connector allows for sturdy but temporary speaker connection without soldering
• Trigger pins 1, 2, 3, and 4. When pins 1+4 are pulled low simultaneously T005.mp3 will play
• Built-in TPA2005D1 based 1.4W Class-D mono amplifier
• Address jumper to select between I2C address 0x37 (default) and 0x38. I2C address is also configurable via software to one of 110 different addresses.

Dimensions

Resources

• Product Page
• Schematic
• Hookup Guide
• Example Sketch
• WT2003S Datasheet
• GitHub

Shipping List

• 1 x SparkFun Qwiic MP3 Trigger
• (Board colour may vary between black or red)