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

 

[BobG]

I bet you can buy an IR volume control at smarthome.... just jack it
into the tape monitor loop

 

[martin griffith]

On Wed, 16 Mar 2005 15:11:50 +0100, in sci.electronics.design
"Maxy888" <maxy888[NOSPAM]@tiscali.it> 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

You need a IR transmitter, (and obviously, ) a receiver.

Start by looking around here
http://holtek.com/english/docum/consumer/6026.htm.

I only know of the domstic Alps type motorised vol. control. a servo
one would need an extra track for feedback, so if you dont have this
3rd track, servoing will be difficult.
pansonic AFAICR do professional faders with motors, but probably
difficult to get in small quantities

martin

"An eye for an eye makes the whole world blind"
Gandhi

 

[Erik Walthinsen]

martin griffith wrote:

I only know of the domstic Alps type motorised vol. control. a servo
one would need an extra track for feedback, so if you dont have this
3rd track, servoing will be difficult.

You can find the motorized pots at
http://www.allelectronics.com/cgi-bin/category.cgi?category=470010&type=store

I have a couple of the first one, haven't used them for anything yet.
They take about 8 seconds to go around fully, so they're designed for
and ideal for "HiFi" equipment. Not so great for pro gear as I was
hoping to modify them for (<250msec transit).

 

[Mark Jones]

Paul Hovnanian P.E. wrote:

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


Must you use a motor-driven pot? There are 'digital potentiometers' that
can replace audio level controls and take up/down pushbutton inputs. All
the brains already built in.

It should be a simple matter to take an IR receiver, decode the up/down
remote buttons with a simple pic and run a couple of these.

To a newcomer to microcontrollers, no PIC is simple.

There was an article in Circuit Celllar on using these in joysticks. The
p/n for their digital pot was a Maxim DS1869. This might be a good place
to start looking.

 

[Paul Hovnanian P.E.]

Mark Jones wrote:

Paul Hovnanian P.E. wrote:
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


Must you use a motor-driven pot? There are 'digital potentiometers' that
can replace audio level controls and take up/down pushbutton inputs. All
the brains already built in.

It should be a simple matter to take an IR receiver, decode the up/down
remote buttons with a simple pic and run a couple of these.


To a newcomer to microcontrollers, no PIC is simple.

True. But unless someone has a ready-made solution for decoding IR
remote control signals, a PIC will be needed. For this problem,
something like a Basic Stamp will do nicely. There is probably some
sample code for IR remote controls somewhere on the 'net reachable with
Google.

There was an article in Circuit Celllar on using these in joysticks. The
p/n for their digital pot was a Maxim DS1869. This might be a good place
to start looking.

--
Paul Hovnanian mailtoaul@Hovnanian.com
------------------------------------------------------------------
100 buckets of bits on the bus
100 buckets of bits
You take one down,
and short it to ground
FF buckets of bits on the bus

 

[Paul E. Bennett]

Paul Hovnanian P.E. wrote:

Mark Jones wrote:

Paul Hovnanian P.E. wrote:
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


Must you use a motor-driven pot? There are 'digital potentiometers'
that can replace audio level controls and take up/down pushbutton
inputs. All the brains already built in.

It should be a simple matter to take an IR receiver, decode the up/down
remote buttons with a simple pic and run a couple of these.

I have done remoted audio volume control using a dual gate MOSFET device in
an amplitude modulator configuration. Very low noise, very simple to
construct the stage and easy to configure remote controls of almost any
type.

To a newcomer to microcontrollers, no PIC is simple.

True. But unless someone has a ready-made solution for decoding IR
remote control signals, a PIC will be needed. For this problem,
something like a Basic Stamp will do nicely. There is probably some
sample code for IR remote controls somewhere on the 'net reachable with
Google.

The IR bit, if just for the volume control could be a simple pulsed device.
If the IR transmitter gave long pulses for increase volume and short pulses
for decrease volume the decoder could be a simple timer/charge-pump
arrangement. Of course, if you need other functions from the remote then
you need to look at the more complex IR decoder solutions that can resolve
a multitude of functions.

--
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Paul E. Bennett ....................<email://peb@amleth.demon.co.uk>
Forth based HIDECS Consultancy .....<http://www.amleth.demon.co.uk/>
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Tel: +44 (0)1235-811095
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