ISD 1820 Voice Recording Module

Key Specifications:

• Main Chip: ISD1820
• Operating Voltage: DC 3V to 5V
• Recording Time: Up to 10-20 seconds (adjustable by changing resistor)
• Speaker Output: Drives an 8Ω, 0.5W speaker directly
• Microphone: Onboard microphone included
• Control: Push-button (REC, PLAYE, PLAYL, P-E) or microcontroller
• Features: Loop playback, jog playback, single-pass play, automatic power-down
• Dimensions: Approx. 43x34x11 mm (module size)

Key Pins & Functions:

• VCC/GND: Power (3-5V) & Ground.
• REC: Active-HIGH, hold to record.
• PLAYE: Edge-triggered playback (single message).
• PLAYL: Level-triggered playback (continues to end of message).
• P-E: Loop playback.

FT: Feed-Through (mic to speaker direct).