I'm doing electronic design, a two-channel amplifier, ask how to change the potentiometer type volume control into a button type it, urgent!

There are two ways, 1 with a motor driven by the drive volume potentiometer, and then a positive and negative voltage control circuit to control the motor on the line, this method in the 80's a lot of amplifiers have such a design manufacturers, and Taobao can now find a lot of benefits do not have to change the line, easy to install, and can be added to the remote function, the shortcomings of no accurate counterpart to the display, and the mechanical drive part! Easy to get out of the problem.

2, DAC electronic volume circuit instead of this Taobao also have many circuit boards sold, the function is basically the same, but the modification of the trouble is easy to destroy the original design, causing unnecessary trouble, and most of the DAC control integrated block are not high-level goods sound quality is average, do not recommend in the high-level hifi use.

The following figure is a relatively simple volume integrated block circuit.