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Petit lecteur audio Exposi'Son Pico, photo 2

This small and affordable device is a standalone audio file player (WAV or MP3) stored on a micro-SD card (sold separately), in mono.

It has a "Play" button for simple use:

A short press (< 1 second) plays the first file once.
A long press (> 1 second) plays the first file in a loop.
Hold the button down at startup and all files will play continuously in sequence.

This module is ideal for creating an audio kiosk, a sound installation, an exhibition, a museum display, a stage setup, integrating into a work of art, for model making, and countless other uses.

If you need help assessing the feasibility of your idea, assistance, building your setup, or anything else, contact me.

For advanced use, read the user manual.

If you're looking for a smarter or stereo module, check out my "Ambi'Son". Need help choosing between the two?

If you need anything at all, contact me!

From
20,00 €

This article is in stock :)

En vidéo

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Additional information

A few demonstrations of what it can be used for:

An old-style telephone
An audio kiosk with headphones and up to 14 buttons
An electronic moo box
My "real waterfall"
A sound sign for a museum or gallery
A user's sound sign
A sound nightlight
Sound design for a work of art
And billions of other ideas...

In Detail

Warning

Since the module is bare, you’ll need to equip it and possibly build a small enclosure. So please make sure that nothing conductive touches the circuit board — not even the metal part of a speaker. A short circuit could permanently damage the Exposi'Son!

Power Supply

The module can be powered between 3.2 and 5 volts, but a 5V supply is recommended to reach the full 3W audio output. The module alone is very energy efficient, which sometimes causes so-called "smart" power banks to shut down due to low power draw, especially at low audio volumes. So: test first!

USB, Batteries or Cells

For optimal autonomy, I recommend USB power. Otherwise, use rechargeable batteries, so plan for a 4-cell holder. For ecological and economic reasons, I NEVER recommend disposable alkaline batteries. They're cheaper but single-use... If I offer holders for 4 rechargeable batteries or 3 disposable cells, it's because rechargeables are 1.2V each (4 x 1.2 = 4.8V), and disposable ones are 1.5V (3 x 1.5 = 4.5V). However, if you're unsure whether you'll use rechargeables or disposables, choose a 3-cell holder.

Expandable

The module includes two screw terminals labeled "1" and "2" on the board — these correspond to "AdKey1" and "AdKey2". You can connect up to 20 push buttons in parallel to these terminals by wiring them in series with resistors (more details in the manual).

And More

To understand how it works, check out the user manual. To build your own module, visit my guide "Build a sound box".

I fully designed the device — from the PCB layout to soldering the components. It’s entirely handmade by me.

So if you encounter any problems, have questions, or need custom modifications for your project, contact me.

Technical Specifications

User manual
Power supply options:
- USB-C, recommended (adapter and cable sold separately)
- Micro-USB
- Battery holder for 4 rechargeable AA or AAA batteries (not included)
- Holder for 1 x 18650 cell (cell not included)
- Holder for 3 non-rechargeable AA or AAA alkaline batteries (batteries not included)
Storage: "MicroSD" or "TF" card (sold separately), up to 32 GB
Formats: .mp3 and .wav
Channels: Mono (left and right mixed)
Playback via push button:
- All files in order, looped
- The first file, once
- The first file, looped
Power and Impedance:
- Amplified 3 Watts @ 4 Ω if chosen with speaker or resonator
- DAC output (not amplified) if chosen with jack output. Perfect for headphones or an external amplifier.
Volume: Analog, adjustable with a screwdriver
Audio outputs, selectable:
- 3.5 mm jack
- 3-Watt speaker (included)
- 3-Watt resonator (included)
Power consumption: between 10 mA and 20 mA
Dimensions: 40 mm diameter, 20 mm thickness. Mounting hole details: see last image.
Sensitive to moisture and rain: use indoors or in a well-protected setup.
Handmade

Sold Separately (optional)

USB-C adapter and cable, for powering the device
MicroSD card, to store your audio files
AA batteries AA (formerly LR06), AAA (formerly LR03), and 18650 rechargeable cells

In Any Case

If you’re a total beginner in electronics, I can install the extra buttons of your choice. Let’s talk about it!
If you’re looking for a more “intelligent” device, check out my "Ambi'Son" module.
Need help choosing between the two?
If you have any questions, contact me!

Photos, videos, components, colors, versions, etc. are non-contractual.