I'm no analog electronics expert by any definition of the word so I
apologize if this question is stupid. I'm looking for a device
( preferably no assembly required ) that functions as the hypothetical
device in the subject : something that takes a control voltage of 0-12
volts and adjusts the output from a voltage source ( a power supply )
from 0-24 volts linearly w.r.t the control voltage while handling up
to 80 watts of power.

Is there any device out there that will do this?

Thanks,

Jonathan Busby

On Mon, 17 Dec 2007 15:51:56 -0800 (PST), Jonathan Busby
<jonathanbusby@gmail.com> wrote:

>I'm no analog electronics expert by any definition of the word so I
>apologize if this question is stupid.

---
This is sci.electronics.basics, where there is no such thing as a
stupid question.
---

>I'm looking for a device
>( preferably no assembly required ) that functions as the hypothetical
>device in the subject : something that takes a control voltage of 0-12
>volts and adjusts the output from a voltage source ( a power supply )
>from 0-24 volts linearly w.r.t the control voltage while handling up
>to 80 watts of power.
>
>Is there any device out there that will do this?

---
Yes. The device is itself a power supply with a voltage sensitive
control input which can be used to control the output voltage.

Finding exactly what you need might involve a huge amount of
legwork, but the best place to start might be by Googling:

"Voltage programmable power supply" with and without the quotes.

Most likely you'll find something with a 0 to 5V or a 0 to 10V input
which will do the adjusting, and if you do, post back and one of us
will tell you how to make it work with your 0 to 12V control
voltage.


--
JF

On Dec 17, 6:23 pm, John Fields <jfie...@austininstruments.com> wrote:
> On Mon, 17 Dec 2007 15:51:56 -0800 (PST), Jonathan Busby
>
> <jonathanbu...@gmail.com> wrote:
> >I'm no analog electronics expert by any definition of the word so I
> >apologize if this question is stupid.
>
> ---
> This is sci.electronics.basics, where there is no such thing as a
> stupid question.
> ---
>
> >I'm looking for a device
> >( preferably no assembly required ) that functions as the hypothetical
> >device in the subject : something that takes a control voltage of 0-12
> >volts and adjusts the output from a voltage source ( a power supply )
> >from 0-24 volts linearly w.r.t the control voltage while handling up
> >to 80 watts of power.
>
> >Is there any device out there that will do this?
>
> ---
> Yes. The device is itself a power supply with a voltage sensitive
> control input which can be used to control the output voltage.

Heh. Yeah. That was the first thing I thought of. I did many extensive
Google searches but came up with nothing that really fit my needs.
( or my wallet )

>
> Finding exactly what you need might involve a huge amount of
> legwork, but the best place to start might be by Googling:
>
> "Voltage programmable power supply" with and without the quotes.

Thanks. I was using "voltage controlled" power supply. Maybe I'll get
more
relevant results with this.

>
> Most likely you'll find something with a 0 to 5V or a 0 to 10V input
> which will do the adjusting, and if you do, post back and one of us
> will tell you how to make it work with your 0 to 12V control
> voltage.

Many thanks.

>
> --
> JF

Jonathan

On Mon, 17 Dec 2007 15:51:56 -0800 (PST), Jonathan Busby
<jonathanbusby@gmail.com> wrote:

>I'm no analog electronics expert by any definition of the word so I
>apologize if this question is stupid. I'm looking for a device
>( preferably no assembly required ) that functions as the hypothetical
>device in the subject : something that takes a control voltage of 0-12
>volts and adjusts the output from a voltage source ( a power supply )
>from 0-24 volts linearly w.r.t the control voltage while handling up
>to 80 watts of power.
>
>Is there any device out there that will do this?
>
>Thanks,
>
>Jonathan Busby

While the voltage-controlled power supply already
mentioned will fill the bill, we might be able to
suggest a different (less expensive, etc) approach
if you gave us the "big picture" of what you are
trying to do.

Best regards,


Bob Masta

DAQARTA v3.50
Data AcQuisition And Real-Time Analysis
http://www.daqarta.com
Scope, Spectrum, Spectrogram, FREE Signal Generator
Science with your sound card!

Jonathan Busby wrote:
>>I'm looking for a device ( preferably no assembly required )
>>[...]that takes a control voltage of 0-12 volts
>>and adjusts the output from a voltage source[...]
>>from 0-24 volts linearly w.r.t the control voltage
>>while handling up to 80 watts of power.
>>
>While the voltage-controlled power supply already
>mentioned will fill the bill,
>
....especially the *no assembly required* part...

Bob Masta wrote:
>we might be able to suggest a different (less expensive
>
Ah. The magic phrase.

>, etc) approach
>if you gave us the "big picture" of what you are trying to do.
>
Yup.
There's lots of ways to skin a cat--if you have details of the cat.
http://groups.google.com/group/sci.elec ... +FET-array