Recorder module ISD1820

Key Technical Specifications

• ​Operating Voltage: 3V to 5V DC
• ​Recording Time: 8 to 20 seconds (default ~10 seconds based on the standard 100kΩ sampling resistor)
• ​Audio Output: Direct drive for an 8Ω / 0.5W small speaker
• ​Controls: Onboard push buttons or microcontrollers (Arduino, ESP32, Raspberry Pi)

​Button Functions & Controls

• ​REC: Press and hold to record audio through the electret microphone (LED lights up while recording).
• ​PLAYE: Playback Edge-triggered. Press once to play the full recorded message.
• ​PLAYL: Playback Level-triggered. Plays audio only while held down; stops when released.
• ​FT (Feed Through): Routes microphone audio directly through the speaker output in real time.

​Header Pinout for Microcontrollers

• ​VCC / GND: Power connections (3V–5V DC).
• ​REC, PLAYE, PLAYL: High-level active pins that allow external control using digital output pins from a microcontroller.
• ​P-E (Looping): Jumper setting or pin to set continuous play in a loop.