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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.
FEATURES:
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Replaces mechanical variable
resistors
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Electronic interface provided for
digital as well as manual control
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Wide differential input voltage
range between 4.5 and 8 volts
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Wiper position is maintained in
the absence of power
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Low-cost alternative to mechanical
controls
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Applications include volume, tone,
contrast,brightness, and dimmer control
The
circuit is extremely simple and compact requiring very few
external components.
The
power supply can vary from 4.5V to 8V.
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