Circuit diagrams and schematics - Electronic projects

This is the Digital Volume Push button, which will replace Volume traditional rotation.With simple circuits.Using only a single IC that is at the heart of the work that is IC1 number DS1669.This circuit uses only one input signal input via pin 1 of IC1,Can be used.The switches S1 and S2 is off by press release [...]

That circuit uses the MSM6322GSK which is only available in small 24 pin plastic SOP style package. A speech pitch converter IC that operates in real time and requires very few external components. It has a microphone preamplifier and line level input and the output requires only a single transistor to directly drive a loudspeaker. [...]

This circuit could be used for replacing your manual volume control in a stereo amplifier. In this circuit, push-to-on switch S1 controls the forward (volume increase) operation of both channels while a similar switch S2 controls reverse (volume decrease) operation of both channels. A readily available IC from Dallas semiconductor, DS1669 is used here. Source:http://www.radioland.net.ua/electronic-circuit-id-24.html [...]