A simple Bluetooth module designed for wiring into car audio systems ... up to the Arduino. The Arduino then flips the DPDT relay, connecting its own I2C interface to the signal processor.

I’ll show you how to drop an Arduino into a cheap speaker as the blueprint for your own audio adventures ... Once the circuit board has been extracted, the Bluetooth interface module should ...

A microcontroller like the kind that powers Arduino dev boards can be manipulated in several different ways. One of the most convenient control methods is to send and receive commands using a serial ...