Product Overview
The TECHTONICS Non-Destructive MP3 Decoding Board is a versatile module designed for playing MP3 audio files from a micro SD card (TF Card) or a USB flash drive (U Disk). It features an onboard 2W mono amplifier, capable of up to 3W output with a 5V power supply, suitable for driving a 4Ω 3W speaker. Additionally, it includes a 3.5mm gold-plated headphone jack for connecting headphones or external audio devices. The module supports flexible power options, including mobile power supply, 3.7V lithium battery, or a 5V USB power supply via its MicroUSB port. Its design allows for easy integration into various projects without requiring complex soldering for speaker connections, making it ideal for applications such as playing messages, warning signals, or custom audio projects.
Figure 1: Top-down view of the TECHTONICS MP3 Decoding Board, highlighting the USB port, TF card slot, control buttons, and audio output terminals. This image provides a general layout of the module's components.
Key Features
- Input Supply Voltage: 3.7V to 5.5V DC.
- Audio Format Support: Supports MP3 format playback.
- Automatic Playback: Automatically begins playing upon power-on.
- LED Indicator: Red LED flashes during MP3 playback.
- Control Buttons: Dedicated buttons for song navigation (up/down), volume control (up/down), pause/play, and mode switching.
- Storage Support: Compatible with U disk (tested up to 32GB) and TF Card (tested up to 16GB) play modes.
- Default Mode: Powers on in TF card mode by default. If no TF card is present, it will switch to U disk mode if available.
- Playback Modes: Menu button allows switching between single song play mode and all song play mode. Default is all song mode.
- Repeat Function: Repeat button cycles through different circulating modes.
Setup Guide
- Power Connection:
Connect the power supply to the module. You can use a 3.7V lithium battery, a 5V USB power supply via the MicroUSB port, or direct 3.7V-5.5V DC input to the BAT+ and BAT- terminals. Ensure correct polarity.
Figure 2: Detail of the power input section, showing the MicroUSB port for 5V power and the BAT+ / BAT- terminals for battery or direct DC input. Proper connection is crucial for operation.
- Speaker Connection:
Connect a 4Ω 3W speaker to the SP+ and SP- terminals. The module features solderless speaker terminals for easy wiring. Ensure the speaker impedance matches the recommendation for optimal performance and to prevent damage.
Figure 3: This image focuses on the audio output section, displaying the screw terminals for speaker connection (SP+ and SP-) and the 3.5mm headphone jack. These are the primary audio output interfaces.
- Audio Source Insertion:
Insert a TF card (micro SD card) with MP3 files into the TF card slot, or connect a USB flash drive (U disk) with MP3 files to the USB-A port. The module will prioritize TF card playback if both are present.
Figure 4: This image illustrates the media input options, specifically the USB-A port for U disks and the TF card slot for micro SD cards. Ensure media is inserted correctly.
- Headphone/External Audio (Optional):
If desired, connect headphones or an external audio system to the 3.5mm gold-plated headphone jack.
Operating Instructions
Once powered on and with an audio source inserted, the module will automatically begin playback. The red LED will flash to indicate active MP3 playback.
Button Functions:
- P/P / Mode Button:
- Short press: Play/Pause toggle.
- Long press: Switch between TF Card mode and U Disk mode. (Default is TF card mode. If TF card is not present, it will automatically switch to U disk mode if available.)
- Prev/V-- Button:
- Short press: Play previous song.
- Long press: Decrease volume.
- Next/V++ Button:
- Short press: Play next song.
- Long press: Increase volume.
- Repeat Button:
- Short press: Cycle through different repeat modes (e.g., repeat one, repeat all).
- Menu Button:
- Short press: Switch between single song play mode and all song play mode. (Default is all song mode upon power-up.)
Maintenance
- Cleaning: Use a soft, dry cloth to clean the module. Do not use liquid cleaners or solvents.
- Storage: Store the module in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Handle the board by its edges to avoid touching components, which could cause damage from static electricity or oils.
- Power Off: Disconnect power when not in use for extended periods.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power/Module not turning on. | Incorrect power connection or insufficient voltage. | Verify power supply connections (BAT+/BAT- or MicroUSB). Ensure voltage is within 3.7V-5.5V range. |
| No sound from speaker/headphones. | Speaker/headphone not connected properly; volume too low; no valid MP3 files. | Check speaker/headphone connections. Increase volume using 'Next/V++' button. Ensure MP3 files are present on TF card/U disk and are not corrupted. |
| Cannot read TF card/U disk. | Card/disk not inserted correctly; unsupported format; corrupted media. | Re-insert TF card/U disk. Ensure media is formatted correctly (FAT32 recommended). Try a different TF card/U disk. Ensure files are in MP3 format. |
| LED not flashing during playback. | No MP3 file playing; module error. | Ensure an MP3 file is actively playing. Check audio source and connections. Power cycle the module. |
Specifications
| Attribute | Value |
|---|---|
| Model Number | TECH2136-000 |
| Input Supply Voltage | 3.7V ~ 5.5V DC |
| Audio Output | 2W Mono Amplifier (up to 3W with 5V supply), 3.5mm Headphone Jack |
| Recommended Speaker | 4Ω 3W |
| Supported Media | TF Card (up to 16GB tested), U Disk (up to 32GB tested) |
| Supported Audio Format | MP3 |
| Dimensions | Approx. 5 x 4 x 2 cm |
| Weight | Approx. 100 g |
Warranty and Support
For warranty information or technical support, please refer to the product's purchase documentation or contact TECHTONICS customer service directly. Specific warranty terms may vary by region and retailer.
Manufacturer: IMPORTED
