Module sound recording based on ISD1820. Has a built-in microphone and speaker attached. Built-in functions allow you to record and playback audio duration to 20 seconds. The device does not have nonvolatile memory. Supply voltage ranging from 3 V to 5 V.
PHAT Speaker is a shield for the Raspberry Pi mounted directly on the GPIO connectors of minicomputer. The module has an I2S DAC and monophonic amplifier 3 W and 10-bar indicator. The kit also includes a small speaker of 8 Ω 2 W.
The module is based on the jednoprzewodowym 8002 amplifier with digital interface. Can work as a simple beep or play music. The volume is adjustable with built in potentiometer. The supply voltage ranges from 2 V to 5.5 V.