The main chip: ISD1820;
Power supply: 3-5V, accessible via pin power.
Recording and playback control: Key control or single-chip, with control lines IO already elicited; supports loop, jog play, and single-pass playback. This module can directly drive 8 Ohm 0.5W small speakers; convenient for 10-second voice recording.
Note: The module's output power is low, so the sound level is also low; it is advised to pair it with a miniature digital audio amplifier board and 3W speakers for enhanced sound output.
Package includes: 6PCS ISD1820 recording module + loudspeaker