If it is very important to keep the activated functions for a long period of time, it is always better to use a digital memory system ... The special function of this touch volume control circuit is ...

A regular Hack A Day reader sent in a tip about an LM386 stero amplifier with digital volume control. The resulting build is very professional and could easily be adapted into a slick iPod dock build.

A regular Hack A Day reader sent in a tip about an LM386 stero amplifier with digital volume control. The resulting build is very professional and could easily be adapted into a slick iPod dock build.

Additional features include a power-supply circuit for condenser microphones, digital-volume control for recording and playback, and a 400-mW speaker amplifier. Peripherals include a 7.35- to 48-kHz ...

In low-end audio systems, digital potentiometers can be used as audio attenuators or amplifiers (Fig. 1). Unfortunately, a large change in volume at an arbitrary time can cause an abrupt ...