The heart of this digital volume controller DVC circuit is IC2 4067, 16-channel analog multiplexer. Because the 1kΩ has been connected between every input and output, the multiplexer can act like a ...

Louder music, sirens or speech in response to higher ambient noise levels? This simple circuit has the answer, and it may enable your robot to be at least as noisy or loud-mouthed as the others in an ...

When Nokia announced their music player capable phones they neglected to mention the lack of support for external headphones. Since the release of the 6230 and its related family with mp3/aac playback ...