Remote controlled audio potentiometer (OT?)

[Maxy888]

Hello,

I would like to change the manual volume potentiometer of my integrated
amplifier with a motor-driven potentiometer which must be infrared
controlled.

My question is simple...

How do I do that?

I've already chosen the potentiometer, what do I need now? A servo control?
And what about the infrared control and reciever?

Do you have any idea about some newsgroup I colud ask in?

Thank You

 

[Jon G.]

If it were me doing it, I'd tear out the remote sensor out of my
old TV, power it up, connect it to a meter, press the volume on
the remote, and see how it affects the sensor. Another
possibility is to see how the channel-up, channel-down buttons
affect the sensor. If I figure anything out, then I could use
the signal to drive a reversible DC motor geared down to 1
revolution per 5 seconds with a slip clutch in case the motor
overshoots or undershoots the limits of the pot.

Maxy888 wrote:

Hello,

I would like to change the manual volume potentiometer of my integrated
amplifier with a motor-driven potentiometer which must be infrared
controlled.

My question is simple...

How do I do that?

I've already chosen the potentiometer, what do I need now? A servo control?
And what about the infrared control and reciever?

Do you have any idea about some newsgroup I colud ask in?

Thank You

 

[Jerry G.]

I don't think you are aware, but the output of the remote sensor will
be a serailized data stream from the remote control. This data stream
consists of a series of packets containing information.

Each of the manufactures are using their own structure. Some are
crossing each other, due to that there are not an infinate possible
number of combinations.

The data stream is feed to a micro-controler that is running an
internal software to analyse the incoming data along with all the other
things it is controling in the TV set, or whatever it is inside of. In
many sets, some of the functions are directly controled by the
micro-controler. Its output can be a combination of serial, parallel,
or voltage control operations to control other devices in the set.

In the end, it is not a direct simple voltage that is outputed from the
IR photo sensor module. You can see this packet information with a
scope. It will look like a series of squarewaves. With a digital
storage scope, it is possible to capture this data stream, see the
parity and checksum bits, and analyse the numeric values that are
present, if you have the base knowledge to know what you are
looking.at.

Jerry G.
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