> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # MP3 Trigger V24 **Type:** Product page · **SKU:** POLOLU-2744 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/mp3-trigger-v24.html ([markdown](https://core-electronics.com.au/mp3-trigger-v24.html.md)) Make some noise with your next project! The MP3 Trigger board is built to make MP3 sound integration easy. The board has 18 external trigger pins that... ## Pricing - **Price:** $98.65 (inc GST) — $89.68 AUD, exc GST - **Quantity discounts:** 6+ $86.09 (exc GST) · 12+ $83.40 (exc GST) ## Availability & dispatch - Out of stock — the product page offers email notification when it returns. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-2744:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/POLOLU-2744:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description **Overview** | [![](https://core-electronics.com.au/attachments/localcontent/0J7164_5808679f8fc.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7164_380226c750e.jpg) | |---| | [![](https://core-electronics.com.au/attachments/localcontent/0J7165_449969c5a71.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7165_33617c5806a.jpg) | |---| The heart of the MP3 Trigger board is the Cypress PSoC CY8C29466-24SXI microcontroller which serves up MP3 data to a VLSI VS1063 audio codec IC. This version also supports an optional initialization file that can be used to set the serial port baud rate as well as to reprogram any of the 18 trigger inputs to alternate functions, including random and sequential track selection, transport controls and even volume up/down. Each conventional trigger can be set to either allow immediate restarts, or to lock out restarts if audio is playing. Also, a new trigger filename convention provides greater flexibility in naming your MP3 tracks and makes file management easier. There is also a “Quiet Mode” feature that can be enabled via the serial control port. In this mode, the trigger inputs don’t start tracks directly, but instead produce a serial message indicating which triggers were activated. A host microcontroller can thus monitor the trigger inputs and then start any track or sequence of tracks via the serial control port, making the triggers much more flexible. This version of the MP3 Trigger includes firmware that supports the use of an initialization file on the microSD card that can be used to change the serial baud rate, as well as to repurpose any of the 18 trigger inputs to alternate functions, such as random and sequential triggers, navigation controls and even volume controls. In addition, a restart lockout option can be used to prevent any trigger from starting a track if audio is already playing. Using these features, custom applications can often be implemented without the use of a separate microcontroller. **Features** - Input voltage range: 4.5 V to 12.0 V DC, or regulated 3.3 V (jumper selectable) - Current consumption: approximately 45 mA idle, 85 mA playing - Media: SDSC and SDHC microSD cards - File system: FAT32 and FAT16 - Audio output:1/8" (3.5 mm) stereo headphone jack - Trigger inputs: Logic level 3.3 V to 5.0 V, active low inputs with internal pull-ups (connector provides individual grounds, allowing switches or jumpers to be connected directly to each trigger input) - Serial: full duplex, 8-bit, 38.4K baud (default, other baud rates supported via initialization file) - [User guide](https://learn.sparkfun.com/tutorials/mp3-trigger-hookup-guide-v24) **Note:** SparkFun calls this product the “MP3 Trigger” SKU: WIG-13720. **People often buy this product together with:** | [![Mini Maestro 12-Channel USB Servo Controller (Assembled)](https://core-electronics.com.au/attachments/localcontent/0J2330_574777fc8e.jpg)](https://core-electronics.com.au/mini-maestro-12-channel-usb-servo-controller-assembled.html) | [Mini Maestro 12-Channel USB Servo Controller (Assembled)](https://core-electronics.com.au/mini-maestro-12-channel-usb-servo-controller-assembled.html) | |---|---| **General specifications** | Interface: | TTL serial | |---|---| | Minimum operating voltage: | 4.5 V[1](https://core-electronics.com.au/#note1) | | Maximum operating voltage: | 12 V | | Minimum logic voltage: | 3.3 V | | Maximum logic voltage: | 5 V | | Supply current: | 45 mA[2](https://core-electronics.com.au/#note2) | **Notes:** 1or regulated 3.3 V (jumper selectable)2idle, 85 mA playing **File downloads** - **MP3 Trigger V24 schematic (170k pdf)** - **MP3 Trigger V24 Eagle CAD files (203k zip)** - **CY8C29466-8 datasheet (2MB pdf)** - **VS1063DS datasheet (1MB pdf)** **Recommended links** - **[MP3 Trigger hookup guide V24](https://learn.sparkfun.com/tutorials/mp3-trigger-hookup-guide-v24)** - **MP3 Trigger support website** - **MP3 Trigger firmware updates** - **[MP3 Trigger on GitHub](https://github.com/sparkfun/MP3_Trigger/)** ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_4518.jpg)