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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

  • Audio recording formatMp3 audio
  • Storage media4 MB
  • Host interfaceUSB
  • ConnectionHeadphones: No headphones jack
  • Battery pack, , , ,
  • DetailsBrand: 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.

How it compares

Measured against everything we stock in Digital Audio & Voice Recorders, at today’s prices. Recalculated every night.

Price $24.99
Cheaper than about 87% of the 321 comparable items (median $49.99).

Specifications

Product
Brand nameStemedu
Model nameST4572
Storage
Storage media4 MB
Audio & video
Audio recording formatMp3 audio
Ports & slots
Host interfaceUSB
ConnectionHeadphones: No headphones jack
Power
Battery pack, , , ,
Size & build
Product weight57 g

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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