Audio Amplifier With Digital Volume Control

This project is about a stereo audio amplifier using two lm386 ics with digital volume control for both left and right speakers.

Audio amplifier with digital volume control. This project is about a stereo audio amplifier using two lm386 ics with digital volume control for both left and right speakers. You can adjust the volume by pressing the touch. We use the mc3340p is the main equipment. In the maximum volume control setting the attenuation is 0 db and in the minimum volume control setting the typical attenuation is 80 db.

To increase or decrease the volume of the amplifier the microphone and other easily. The audio out signal will increase decrease when user rotating the knob bluetooth audio volume control port will also output an increase decrease control signal. This digital volume control has no pot to wear out and introduces almost no noise in the circuit. A potentiometer does not control the gain of the signal but it forms a voltage divider and that is why the input signal gets attenuated.

So in this project i am going to show you how to build your digital volume controller with the ic pt2258 and interface it with an arduino to control the volume of an amplifier circuit you can also check various audio related circuits here including vu meter. This project describes how to use maxim s ds1868 digital potentiometer with a pic microcontroller to make a digital volume control for audio amplifiers. It is suitable for typical uses include instrumentation control remote control audio amplifiers electronic games and catv cable tv set top converter audio control. The series is also equipped with a selector mute standby and operating.

The potentiometer does not control the gain of the amplifier itself but it creates a voltage divider network at the input which in fact controls the fraction of the audio signal that is fed to the amplifier. Universal car audio amplifier rca amplifier audio adjuster gain level bass boost volume control knob for car motorcycle speakers home theater 1 pack 4 3 out of 5 stars 25 11 99 11. 8 1cm x 3 8cm bluetooth audio volume control singal ended audio volume control external. Instead the volume is controlled by pressing up and down buttons.

The potentiometer does not control the gain of the amplifier itself but it creates a voltage divider network at the input which in fact controls the fraction of the audio signal that is fed to the amplifier. Techniques for adjusting the volume in this series has been provided with a pin path control that is controlled by providing an input voltage vcc and gnd. C1 0 1uf ceramic disc capacitor u1 ds1669 digital pot ic see notes read more. You can use it to control any normal amplifier board audio volume.

This simple circuit would be a great touch to any home audio project.