Audio Voice Recording ISD1820 Module With Microphone + Loudspeaker

AED 28.10



The ISD1820 Voice Record and Playback Module offers a straightforward way to record and playback audio, with a recording duration of up to 10 seconds, extendable to 20 seconds by changing a resistor. It comes with various features, including MCU and manual control, making it versatile for different applications.

Package Includes:

  • ISD1820 Voice Record and Playback Module

Key Features:

  • Record and playback up to 10 seconds of audio, extendable to 20 seconds.
  • Control via pushbutton or MCU.
  • Edge or level-activated playback.
  • Built-in microphone for recording.
  • On-chip 8-ohm speaker driver.
  • Auto power-down mode for energy efficiency.
  • Operating voltage: 2.6 - 5V.


  • Main chip: ISD1820
  • Size: 38 mm * 42.5 mm

Package Contents:

  • 1 PCS * ISD1820 Module
  • 1 PCS * Loudspeaker
  • 1 PCS * Free cables

Control Features:

  • REC (RECORD): Activated when the pin is HIGH for recording. Release to stop.
  • PLAYE (PLAY Edge): Playback activated on HIGH transition, stops at End-Of-Message (EOM).
  • PLAYL (PLAY Level): Playback active when the pin is HIGH until set to LOW or EOM is reached.
  • PTREPEAT (REPEAT Jumper): Enables continuous playback.
  • FT (FT Jumper): Enables Feed-Thru mode to send audio from the microphone to the speaker.
  • LED Output: Goes LOW when LED is lit.
  • VCC: Operates between 2.6 to 5.5V.
  • GND: Should be connected to the uC ground.
  • NC (No Connect): Unused pin.

Resistor-Controlled Oscillator (ROSC):

  • ROSC input determines recording duration, sample rate, and bandwidth.
  • The duration can be adjusted by changing the resistor value per the table below.
ROSC Duration Sample Rate Bandwidth
80K Ohm 8 Secs 8.0kHz 3.4kHz
100K Ohm 10 Secs 6.4kHz 2.6kHz
120K Ohm 12 Secs 5.3kHz 2.3kHz
160K Ohm 16 Secs 4.0kHz 1.7kHz
200K Ohm 20 Secs 3.2kHz 1.3kHz

Audio Output:

  • The module can drive an 8-ohm speaker.
  • It can be used to drive an audio amplifier for louder sound if needed.