SKU: SENS-3119
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ISD1820 Voice Recording Module with Onboard Mic & Speaker Output

₹146.00 (Inclusive of all taxes)
Out of Stock

The ISD1820 Voice Recording Module is a standalone audio capture and playback board featuring a non-volatile analog memory chip, onboard electret microphone, and direct 8Ω speaker drive. It operates from 3–5V DC and is easily integrated with Arduino, Raspberry Pi, or other microcontroller platforms for adding voice alerts, messages, or sound effects to projects.

Features

  • ISD1820 Chip for up to 10 seconds of analog voice recording & playback
  • Onboard electret microphone and direct 8Ω, 0.5W speaker output
  • Simple push-button or microcontroller control (record, play, loop)
  • Non-volatile storage retains audio without power
  • Compact 42mm x 37mm x 11mm module, 3–5V DC operation

Out of stock

Description

The ISD1820 module utilizes a dedicated voice record/playback IC that stores audio in analog form within non-volatile memory cells, providing natural sound quality without the complexity of digital audio codecs. The integrated electret microphone and audio amplifier allow for a complete, standalone audio subsystem.

Control is managed via tactile push-buttons for manual operation or through digital I/O pins for microcontroller integration, supporting multiple playback modes including single-shot, loop, and jog. Its low-voltage, low-power design makes it suitable for portable and battery-powered applications.

Key Features

  • ISD1820-based analog audio recording and playback system
  • Integrated electret condenser microphone with pre-amplifier
  • Direct drive output for 8Ω, 0.5W speaker
  • Non-volatile analog memory retains recordings without power
  • Simple 3–5V DC power supply requirement
  • Control via physical buttons or microcontroller digital I/O
  • Supports playback modes: single, loop, and jog (playback while recording)
  • Compact PCB footprint for easy integration into enclosures

Applications

  • DIY voice alert and message systems for smart home devices
  • Educational kits for demonstrating analog audio storage and playback
  • Simple audio feedback in robotics and interactive projects
  • Standalone talking alarms, timers, or toy sound modules
  • Prototyping voice prompts for industrial equipment status indicators

Technical Specifications

IC / Core ComponentISD1820
FunctionalityRecord, Store, and Playback Voice
Maximum Recording Time~10 seconds
Operating Voltage3–5 V DC
MicrophoneOnboard Electret
Speaker Output Support8Ω, 0.5W
Control InterfacePush-Buttons & Microcontroller I/O Pins
Storage TypeNon-volatile Analog Memory
Module Dimensions (L x W x H)42 mm x 37 mm x 11 mm
Module Weight9 g
CompatibilityArduino, Raspberry Pi, General Microcontrollers

Frequently Asked Questions

What is the maximum recording length of the ISD1820 module?

The module supports a maximum recording duration of approximately 10 seconds using the standard ISD1820 chip configuration. This time is fixed by the internal analog memory array and cannot be extended via firmware.

How do I control the module with an Arduino or microcontroller?

Control is achieved via three digital I/O pins: REC (record), PLAY (playback), and FT (feedthrough/loop). Pulling these pins low triggers the corresponding function. The module's push-buttons work by shorting these control pins to ground, providing a simple interface for both manual and automated operation.

What type of speaker can I connect to the output?

The module's audio amplifier is designed to directly drive a small 8-ohm speaker with a power rating up to 0.5 watts. For louder volume or different impedance, an external audio amplifier stage would be required.

Are the recordings saved when power is removed?

Yes. The ISD1820 chip uses non-volatile analog storage cells, meaning the recorded audio is retained indefinitely without any power supply, similar to EEPROM but for analog signals.

Package Includes

  • 1 x ISD1820 Voice Recording Module with Onboard Mic
  • 1 x 2-Pin JST XH Connector

Additional Information

Weight 0.009 kg
Dimensions 4.2 × 3.7 × 1.1 cm