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Stemedu ST4572 voice recorder module board with PIR sensor and speaker

Stemedu ST4572 Voice Recorder Module with PIR Sensor

SKU CH-0EH2-4P7V6

DIY voice-recording board with PIR motion trigger, 4 MB internal storage, TF card slot and USB file transfer

  • Recording Formatmp3_audio
  • Recording Media4 MB
  • PC InterfaceUSB
  • ConnectorHeadphones: No headphones jack
  • Battery, , , ,
  • SpecificationsBrand: Stemedu, Format: mp3_audio, Skip_offer: false, Item_w
  • Records and plays MP3 audio with built-in 4 MB storage and optional TF card
  • PIR motion sensor triggers playback automatically when movement is detected within range
  • Five tactile buttons provide play/pause, volume, loop and single-pass control
  • Mini-USB interface appears as a mass-storage device for drag-and-drop file transfer
  • Includes 3 W amplifier, speaker, PIR module and AA battery case for standalone operation

DIY voice recorder with PIR trigger

This Stemedu ST4572 module records and plays MP3 audio for custom projects. It includes a speaker, PIR motion sensor and battery case so the board can operate without a permanent power connection. The kit is aimed at makers who want a self-contained sound board for interactive displays or welcome messages.

Adds motion-activated playback to a basic recorder

Unlike a plain recording module, this board triggers audio when the PIR sensor detects movement up to about five metres. The potentiometer lets you tune sensitivity without changing code. The upgrade is worthwhile when you need hands-free activation in shops, hallways or safety exhibits rather than manual button presses.

Fits small enclosures and runs on AA cells

The sensor board measures 30 by 36 millimetres and connects through a 2.54 millimetre terminal, making it easy to mount inside a project box. Power comes from three AA batteries housed in the supplied case, so no external supply is required. A micro-USB data cable is needed for loading files, and a TF card up to 8 GB can extend storage beyond the built-in 4 MB.

Highlights

  • Records and plays MP3 audio with built-in 4 MB storage and optional TF card
  • PIR motion sensor triggers playback automatically when movement is detected within range
  • Five tactile buttons provide play/pause, volume, loop and single-pass control
  • Mini-USB interface appears as a mass-storage device for drag-and-drop file transfer
  • Includes 3 W amplifier, speaker, PIR module and AA battery case for standalone operation

Specifications

BrandStemedu
ModelST4572
Recording Formatmp3_audio
Recording Media4 MB
PC InterfaceUSB
ConnectorHeadphones: No headphones jack
Battery, , , ,
SpecificationsBrand: Stemedu,
Format: mp3_audio,
Skip_offer: false,
Item_weight: 57 grams,
Part_number: ST4572,
Unspsc_code: 52161500,
Manufacturer: Stemedu,
Model_number: ST4572,
Headphones_jack: No headphones jack,
Batteries_included: false,
Batteries_required: false,
Compatible_devices: Personal Computer,
Hardware_interface: usb,
Item_package_weight: 0.1 kilograms,
Microphone_form_factor: Built-In,
Item_package_dimensions: 4.699 L x 10.2108 W x 10.3124 H centimeters,
Memory_storage_capacity: 4 MB,
Product_site_launch_date: 2021-07-11T07:00:00Z,
Microphone_operation_mode: Mono,
Supplier_declared
Weight57 grams

Questions about this item

What size PIR sensor and terminal pitch come with the ST4572 module?

The PIR sensor measures 30mm by 36mm and uses a 2.54mm terminal port.

Which cable type must be used for the Mini-USB computer connection?

A data-capable Micro USB cable is required; charge-only cables will not let the computer recognise the module.

What battery configuration does the supplied empty case accept?

The case holds three AA batteries (not included) and connects via its built-in terminal.

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