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This small device is a standalone audio file player that reads files from a micro-SD card (sold separately). It plays WAV, MP3, or WMA files stored on it, in mono.

If you're looking for a more "intelligent" device, check out my "Ambi'Son Mini" module.

When purchasing, you can choose from the following options:

Power supply:
- Micro-USB connector (transformer and cable not included)
- OR 4 AAA battery box (batteries not included)
- OR 3 AA battery box (batteries not included).
Audio output:
- Mini-jack (3.5 mm) connector.
- OR 3 Watt speaker
- OR 3 Watt resonator

It is ideal for creating a sound installation, museography, staging, an audio kiosk, integrating into a work of art, or for model railroading, for example.

Here are a few examples of what can be done with it:

From
18,00 €

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Technical specifications

User manual
Power supply:
- Micro-USB
- 3 AA battery box (batteries not included)
- 4 AAA battery box (batteries not included)
Support: "MicroSD" or "TF" card (sold separately), formatted in Fat16 or ExFat, up to 32 GB
Formats: .mp3, .wav, and .wma
Audio outputs:
- 3.5 mm jack (use a male stereo jack, not mono)
- or Screw terminal
Impedance: amplified 3W
Channels: Mono
Playback, selection via push button:
- All files in order, looped
- The first file, once
- The first file, looped
Volume: Manually adjustable, analog
Power consumption: between 10 mA and 20 mA
Current version: V4

In detail

The module includes a push button: a short press plays the first file once, a long press plays it in a loop. If you press the button during startup or short-circuit the "AdKey1" terminal, it loops all files on the card.

Indeed, it has two screw terminals labeled "1" and "2" on the board: these are "AdKey1" and "AdKey2". You can add multiple push buttons in parallel to their terminals by wiring them in series with resistors (more information here).

The module can be powered between 3.2 and 5 volts. The module alone is very energy-efficient: less than 10 mA! Sometimes, so-called "smart" powerbanks go into sleep mode, cutting off power, especially at low sound levels. Test it out!

If you want to understand how it works, or to be able to launch several files, check out the user manual. If you want to build one yourself, head to my guide "Building a sound box".

As the module is bare, it's up to you to equip it and build a small case if you wish, and make sure that nothing conductive touches the printed circuit board, not even the metal from the speaker. A short circuit could be fatal for the Pico!

I completely designed the device: from drawing the electronic board to soldering the components. It is made by my own hands.

If you encounter any issues, contact me.