Adafruit MEMS Mic Breakout
PDM is the 'third' kind of microphone you can integrate with electronics, apart from analog or I2C. These microphones are very commonly used in products, but are rarely see..
Gravity: Digital Speaker Module
This speaker module is based on the 8002 speaker amplifier IC. It can be used as a buzzer and also play high quality audio. Volume output is controlled via the potenti..