---
product_id: 157572139
title: "SparkFun Qwiic MP3 Trigger WT2003S MP3 decoder with Built-in TPA2005D1 Based 1.4W Class-D Mono Amplifier microSD supports 128MB to 32GB cards ATtiny84 receives I2C commands & controls the MP3 decoder"
brand: "sparkfun"
price: "204 kr"
currency: ISK
in_stock: false
reviews_count: 2
url: https://www.desertcart.is/products/157572139-sparkfun-qwiic-mp3-trigger-wt2003s-mp3-decoder-with-built-in
store_origin: IS
region: Iceland
---

# Supports up to 32GB microSD 1.4W Class-D Mono Amplifier I2C control via ATtiny84 SparkFun Qwiic MP3 Trigger WT2003S MP3 decoder with Built-in TPA2005D1 Based 1.4W Class-D Mono Amplifier microSD supports 128MB to 32GB cards ATtiny84 receives I2C commands & controls the MP3 decoder

**Brand:** sparkfun
**Price:** 204 kr
**Availability:** ❌ Out of Stock

## Summary

> 🎵 Elevate your sound game—command your playlist with a single I2C tap!

## Quick Answers

- **What is this?** SparkFun Qwiic MP3 Trigger WT2003S MP3 decoder with Built-in TPA2005D1 Based 1.4W Class-D Mono Amplifier microSD supports 128MB to 32GB cards ATtiny84 receives I2C commands & controls the MP3 decoder by sparkfun
- **How much does it cost?** 204 kr with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/157572139-sparkfun-qwiic-mp3-trigger-wt2003s-mp3-decoder-with-built-in)

## Best For

- sparkfun enthusiasts

## Why This Product

- Trusted sparkfun brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Loud:** Tiny 0.01 oz footprint packs a punch with a built-in 1.4W Class-D amplifier driving external speakers with crystal-clear clarity.
- • **Effortless Integration:** Qwiic system enables solderless I2C commands to trigger tracks, adjust volume, and chain multiple devices for immersive soundscapes.
- • **Precision Sound Control:** 32 volume levels and customizable EQ presets stored in non-volatile memory for consistent audio vibes every time.
- • **Trigger Your Soundtrack:** Four hardware trigger pins let you launch up to 10 custom MP3s instantly—perfect for dynamic environments or interactive setups.
- • **Plug & Play Audio Powerhouse:** Seamlessly load MP3s via USB-C—no drivers, no conversion, just instant sound.

## Overview

The SparkFun Qwiic MP3 Trigger WT2003S is a compact, USB-C accessible MP3 decoder with built-in 1.4W Class-D amplifier, supporting microSD cards up to 32GB. Controlled via an ATtiny84 microcontroller over I2C, it offers 32 volume levels, EQ customization, and hardware trigger pins for instant playback. Designed for easy integration with solderless Qwiic connectors, it’s ideal for professionals seeking programmable, high-quality audio playback in compact embedded systems.

## Description

Sometimes you just need an MP3 to play. Whether it’s a theme song as you enter the room or a power song when you are working out. The SparkFun Qwiic MP3 Trigger takes care of all the necessary requirements, all you need to do is send a simple I2C command and listen to whatever is on your micro SD card. Utilizing our handy Qwiic system, no soldering is required to connect it to the rest of your system. However, we still have broken out 0.1"-spaced pins in case you prefer to use a breadboard. When a USB-C cable is connected to the Qwiic MP3 Trigger the contents of the microSD card appears as a jump drive. Simply plug in the Qwiic MP3 Trigger and you’ll be transferring MP3s, no need for drivers and no need for WAV or Vorbis conversion! Sound output is provided via a 3.5mm headphone jack or poke-home connector allowing an external speaker to be connected without soldering. Your supplied speaker is boosted by a Class-D mono amplifier capable of outputting up to 1.4W making it capable of being incredibly loud! Volume is software selectable between 32 levels while equalization can be tuned to be sure your classical hits sound different from your jazz dance routines. If you don’t want to deal with any programming, there are four trigger pins. When pin 3 is pulled low the T003.mp3 file will immediately be played. This allows you to start playing sound effects with the touch of a button! By pulling multiple pins down simultaneously the four triggers can play up to ten tracks: T001 to T010. 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.

Review: Unreliable - I'm an AV engineer and bought this to use as an MP3 doorbell through a BSS Digital signal processor. The concept and product works...for a day or two. I've tried this multiple times and after a short period of time the audio files corrupt and no longer play properly. The mp3 tracks degrade into pops and garbled noises. Updating the file every day unfortunately doesn't wok for my application but overall the product does do what it says....briefly.
Review: Great product, poor quality control - Sparkfun is usually my go-to source for various electronics odds-and-ends. This might just be me, but I've noticed recently that build quality has gone down for their electronic assemblies overall. The !INT pin did not work on this board - the pin remained high and would not change states even after a song finished playing. I used proper logic-level shifting boards to interface signals between the 3.3V MP3 Trigger and my 5V Arduino microcontroller.

## Features

- 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
- Volume, EQ setting, and I2C address settings stored in non-volatile memory and loaded at each power-on
- 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
- Arduino library to make MP3 playing over I2C a breeze. Play tracks, change volume, play next/previous, check if track is playing, stop play, change EQ, and change I2C address are all supported.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07NCT2GDS |
| Brand | SparkFun |
| Brand Name | SparkFun |
| Cable Type | USB |
| Color | Black |
| Compatible Devices | Speaker |
| Connector Gender | Female-to-Female |
| Connector Type | Auxiliary, USB Type C |
| Customer Reviews | 3.2 out of 5 stars 5 Reviews |
| Item Shape | Round |
| Item Weight | 0.01 Ounces |
| Manufacturer | SparkFun |
| Other Special Features of the Product | Tangle Free |
| Special Feature | Tangle Free |
| UPC | 845156009213 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** SparkFun
- **Cable Type:** USB
- **Compatible Devices:** Speaker
- **Connector Type:** Auxiliary, USB Type C
- **Special Feature:** Tangle Free

## Images

![SparkFun Qwiic MP3 Trigger WT2003S MP3 decoder with Built-in TPA2005D1 Based 1.4W Class-D Mono Amplifier microSD supports 128MB to 32GB cards ATtiny84 receives I2C commands & controls the MP3 decoder - Image 1](https://m.media-amazon.com/images/I/41XMKRG4cpL.jpg)
![SparkFun Qwiic MP3 Trigger WT2003S MP3 decoder with Built-in TPA2005D1 Based 1.4W Class-D Mono Amplifier microSD supports 128MB to 32GB cards ATtiny84 receives I2C commands & controls the MP3 decoder - Image 2](https://m.media-amazon.com/images/I/41+XvNAnedL.jpg)
![SparkFun Qwiic MP3 Trigger WT2003S MP3 decoder with Built-in TPA2005D1 Based 1.4W Class-D Mono Amplifier microSD supports 128MB to 32GB cards ATtiny84 receives I2C commands & controls the MP3 decoder - Image 3](https://m.media-amazon.com/images/I/51pPhAPhZtL.jpg)
![SparkFun Qwiic MP3 Trigger WT2003S MP3 decoder with Built-in TPA2005D1 Based 1.4W Class-D Mono Amplifier microSD supports 128MB to 32GB cards ATtiny84 receives I2C commands & controls the MP3 decoder - Image 4](https://m.media-amazon.com/images/I/51ATw6LB5sL.jpg)
![SparkFun Qwiic MP3 Trigger WT2003S MP3 decoder with Built-in TPA2005D1 Based 1.4W Class-D Mono Amplifier microSD supports 128MB to 32GB cards ATtiny84 receives I2C commands & controls the MP3 decoder - Image 5](https://m.media-amazon.com/images/I/518bhHXX0yL.jpg)

## Customer Reviews

### ⭐⭐ Unreliable
*by M***N on July 3, 2020*

I'm an AV engineer and bought this to use as an MP3 doorbell through a BSS Digital signal processor. The concept and product works...for a day or two. I've tried this multiple times and after a short period of time the audio files corrupt and no longer play properly. The mp3 tracks degrade into pops and garbled noises. Updating the file every day unfortunately doesn't wok for my application but overall the product does do what it says....briefly.

### ⭐⭐ Great product, poor quality control
*by D***N on November 9, 2019*

Sparkfun is usually my go-to source for various electronics odds-and-ends. This might just be me, but I've noticed recently that build quality has gone down for their electronic assemblies overall. The !INT pin did not work on this board - the pin remained high and would not change states even after a song finished playing. I used proper logic-level shifting boards to interface signals between the 3.3V MP3 Trigger and my 5V Arduino microcontroller.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.is/products/157572139-sparkfun-qwiic-mp3-trigger-wt2003s-mp3-decoder-with-built-in](https://www.desertcart.is/products/157572139-sparkfun-qwiic-mp3-trigger-wt2003s-mp3-decoder-with-built-in)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-04*