I R Motorised volume control.
 

Anyone know of such a thing at a reasonable cost? I realise Vellerman do a
VCA type, but the actual audio quality isn't good, and it defaults to zero
if powered down. A kit without case and PS would be fine as it will be
built in. Or a complete unit if cheap enough.

--
*I wonder how much deeper the ocean would be without sponges.

Dave Plowman London SW
To e-mail, change noise into sound.

I R Motorised volume control.
 

"Dave Plowman (News)" wrote:

Anyone know of such a thing at a reasonable cost? I realise Vellerman do a
VCA type, but the actual audio quality isn't good, and it defaults to zero
if powered down. A kit without case and PS would be fine as it will be
built in. Or a complete unit if cheap enough.

You reckon there might be a market for this ? Could be a simplish project.

Graham

I R Motorised volume control.
 

"Dave Plowman (News)" wrote in message
...
Anyone know of such a thing at a reasonable cost? I realise Vellerman do a
VCA type, but the actual audio quality isn't good, and it defaults to zero
if powered down. A kit without case and PS would be fine as it will be
built in. Or a complete unit if cheap enough.

--
*I wonder how much deeper the ocean would be without sponges.

Dave Plowman London SW
To e-mail, change noise into sound.

Milford Instruments sells an IR decoder which can be used to switch power to
a motorised pot. It also learns the codes from any common remote.
http://www.milinst.com/index.htm
part # 1-933 at £29

I have used one of these in the past to make a remote switch box , with the
decoder driving relays - worked perfectly.

I R Motorised volume control.
 

On Sat, 16 Oct 2004 10:59:14 +0000 (UTC), "CyaD"

Milford Instruments sells an IR decoder which can be used to switch power to
a motorised pot. It also learns the codes from any common remote.
http://www.milinst.com/index.htm
part # 1-933 at £29

I have used one of these in the past to make a remote switch box , with the
decoder driving relays - worked perfectly.


It's a bit hard to find on their Web pages. I eventually tracked it
down under the "Robotics" section.


--
Chris Isbell
Southampton, UK

I R Motorised volume control.
 

"CyaD" wrote:

"Dave Plowman (News)" wrote in message
...
Anyone know of such a thing at a reasonable cost? I realise Vellerman do a
VCA type, but the actual audio quality isn't good, and it defaults to zero
if powered down. A kit without case and PS would be fine as it will be
built in. Or a complete unit if cheap enough.

Milford Instruments sells an IR decoder which can be used to switch power to
a motorised pot. It also learns the codes from any common remote.
http://www.milinst.com/index.htm
part # 1-933 at £29

I have used one of these in the past to make a remote switch box , with the
decoder driving relays - worked perfectly.


This is exactly what I used in my home-brew pre-amp, driving an ALPS
motorised pot. Maplin used to sell this module, but don't seem to
any more. I removed the IR detector from the PCB and mounted it on
the front panel of the case. I used a couple of switching transistors
and relays to drive the pot - possibly not the most elegant solution
but there's no chance of getting 'up' and 'down' at the same time
(with unfortunate consequences on the PSU!). I also used a buffer amp
on the output to avoid any impedance problems.

It works fine - the volume control isn't the most responsive in the
world (i.e. it's hard to achieve very small changes in level and
there's a certain lag between pressing the remote button and any
volume change). I used the other outputs from the IR module to switch
inputs and for a mute.

It can sound good too - indistinguishable to my ears from plugging my
cd player (with output level lowered) straight into the power amp.

Alternatively, I seem to remember that Creek did some simple
"pre-amps" that had IR control - they may not be what you call cheap
enough though :-)

Good luck and BRs,
Martin

I R Motorised volume control.
 

In article ,
Pooh Bear wrote:
Anyone know of such a thing at a reasonable cost? I realise Vellerman
do a VCA type, but the actual audio quality isn't good, and it
defaults to zero if powered down. A kit without case and PS would be
fine as it will be built in. Or a complete unit if cheap enough.

You reckon there might be a market for this ? Could be a simplish
project.

I need one for a one off project. But plenty seem to like passive
pre-amps, and that would allow just simple remote control of level without
any chance of signal degradation.
But I can see if it was sold in a box with a fancy label it wouldn't be
good value...

--
*Re-elect nobody

Dave Plowman London SW
To e-mail, change noise into sound.

I R Motorised volume control.
 

"Dave Plowman (News)" wrote in message
...
Anyone know of such a thing at a reasonable cost? I realise Vellerman do a
VCA type, but the actual audio quality isn't good, and it defaults to zero
if powered down. A kit without case and PS would be fine as it will be
built in. Or a complete unit if cheap enough.

**Funnily enough, I had a request from a client last week for just such a
thing. The local electronics stores used to sell them as kits, but no longer
do. I tracked down the PCB supplier, who still has some boards left. He also
has the microprocessors available as well. I will be ordering a kit for my
client. I will be using an ALPS 'Blue Velvet' pot for my client. Let me know
if you want me to secure another PCB and micro for you.


--
Trevor Wilson
www.rageaudio.com.au

I R Motorised volume control.
 

In article ,
Trevor Wilson wrote:
**Funnily enough, I had a request from a client last week for just such
a thing. The local electronics stores used to sell them as kits, but no
longer do. I tracked down the PCB supplier, who still has some boards
left. He also has the microprocessors available as well. I will be
ordering a kit for my client. I will be using an ALPS 'Blue Velvet' pot
for my client. Let me know if you want me to secure another PCB and
micro for you.

That sounds ideal, Trevor. I'll try sending you an e-mail. ;-)

--
*Reality? Is that where the pizza delivery guy comes from?

Dave Plowman London SW
To e-mail, change noise into sound.

I R Motorised volume control.
 

Trevor Wilson wrote:


"Dave Plowman (News)" wrote in message
...
Anyone know of such a thing at a reasonable cost? I realise Vellerman do
a VCA type, but the actual audio quality isn't good, and it defaults to
zero if powered down. A kit without case and PS would be fine as it will
be built in. Or a complete unit if cheap enough.

**Funnily enough, I had a request from a client last week for just such a
thing. The local electronics stores used to sell them as kits, but no
longer do. I tracked down the PCB supplier, who still has some boards
left. He also has the microprocessors available as well. I will be
ordering a kit for my client. I will be using an ALPS 'Blue Velvet' pot
for my client. Let me know if you want me to secure another PCB and micro
for you.



Do you know who made the kits? Is there a published circuit diagram?

Ian
--
Ian Bell

I R Motorised volume control.
 

"Ian Bell" wrote in message
...
Trevor Wilson wrote:


"Dave Plowman (News)" wrote in message
...
Anyone know of such a thing at a reasonable cost? I realise Vellerman do
a VCA type, but the actual audio quality isn't good, and it defaults to
zero if powered down. A kit without case and PS would be fine as it will
be built in. Or a complete unit if cheap enough.

**Funnily enough, I had a request from a client last week for just such a
thing. The local electronics stores used to sell them as kits, but no
longer do. I tracked down the PCB supplier, who still has some boards
left. He also has the microprocessors available as well. I will be
ordering a kit for my client. I will be using an ALPS 'Blue Velvet' pot
for my client. Let me know if you want me to secure another PCB and micro
for you.



Do you know who made the kits?

**Yes. They're locally assembled (here in Australia).

Is there a published circuit diagram?

**Yes. I'll post more information, as I recieve it.


--
Trevor Wilson
www.rageaudio.com.au