The ESP32 is a microcontroller that provides an API for Bluetooth A2DP which can be used to receive sound data e.g. from your Mobile Phone and makes it available via a callback method. The output is a ...

Building on that concept, the next objective was to create an even smaller FM radio compact enough to fit inside an earbud.

Circuit: Arduino-Powered AM Transmitter Circuit: Arduino-Powered AM Transmitter Interested in audio-related projects? One of the most popular Elektor projects in 2015 was Burkhard Kainka's medium-wave ...

Circuit: Ultrasonic Directive Speaker Back in 2011, Elektor presented a DIY 50-m range directive sound beam using an array of piezo ultrasonic transducers (up to 200) driven with a PWM signal. While ...

This proof-of-concept is just waiting for you to put it to good use. [Mike Tsao] wrote an Arduino sketch that lets him decode incoming audio data which could be used to program the device. He&#8217… ...