One fun and cool thing for ardent audio folks to do is switch the volume of an audio amplifier between levels on a digital panel. Here’s a simple project to help you understand the technology behind ...

The PT2257 is a 2 channel, stereo, volume controller with an I2C interface. Sometimes you need to control more devices than possible with the default address range the device provides. This is ...

This Arduino based MIDI volume pedal is capable of reading the position of an analog pedal, translating the A/D value into the proper numerical range, and sending MIDI signals to a synthesizer. A ...

I'm happy to flag this one, a new volume of the Arduino Project Handbook. Volume 2 sees twenty-five more beginner-friendly electronics projects, revolving around the Atmel AVR-based Arduino Uno board.