Article on Replacement of potentiometers in todays electronic

[[email protected]]

Hi all

I once read an article on how potentiometers are replaced in todays electronic, by digatal ways....

Does this ring a bell for anyone?

WBR
Sonnich

 

[amdx]

Hi all

I once read an article on how potentiometers are replaced in todays electronic, by digatal ways....

Does this ring a bell for anyone?

WBR
Sonnich




https://www.google.com/search?q=dig...m%2Fapp-notes%2Findex.mvp%2Fid%2F3970;519;348

Hope that gets you started.
Mikek

 

[Jeff Urban]

In brownwares I only see actual pots where the voltage is too high or
there is another reason, such as high end audio.

 

[petrus bitbyter]

Hi all

I once read an article on how potentiometers are replaced in todays
electronic, by digatal ways....

Does this ring a bell for anyone?

WBR
Sonnich

Ever seen a potentiometer in a remote control? In todays monitors? In a
mobile phone? An MP3 player?

petrus bitbyter

 

[Greegor]

Hi all
I once read an article on how potentiometers
are replaced in todays electronic, by digatal
ways.... Does this ring a bell for anyone?
WBR
Sonnich

Ever seen a potentiometer in a remote control?
In todays monitors? In a mobile phone?
An MP3 player?
petrus bitbyter

Still very common in amplified speaker sets
to use with computers or MP3 players.

Cheap alarm clock radios still use pots.

Google on "digital potentiometer".
I just got got "About 1,540,000 results".

Most of the chips for that are just over a buck.

Some of those are for rotary controls
but some others are for up/down buttons.

Some of these chips appear to be made
to drop in place of variable resistors,
while some others seem to be integrated
into amplifiers.

If you've already got a uC it can be
done without such a chip using two
input lines w/ buttons.

Expect production levels of carbon
potentiometers to stabilize at a
very low level (specialty item)
because of fewer uses.

One big plus is that lots of these
digital potentiometers work with
remote control input.

 

[miso]

Hi all

I once read an article on how potentiometers are replaced in todays
electronic, by digatal ways....

Does this ring a bell for anyone?

WBR
Sonnich

I've got a decent stash of 10 turn posts. Some of the cheap PCB
variety. But a few are the 10 turns with attached verniers. Long live
analog!

They do make Chinese knock offs:
http://www.circuitspecialists.com/xsn-vernier.html

 

[josephkk]

Ever seen a potentiometer in a remote control? In todays monitors? In a
mobile phone? An MP3 player?

petrus bitbyter

Well not exactly, i saw a motorized pot controlled by a remote control.
(Medium grade stereo). Is this close enough for you?

?-)

 

[[email protected]]

In brownwares I only see actual pots where the voltage is too high or
there is another reason, such as high end audio.

Even there (high-end audio), it's digital with perhaps a rotary
encoder to make people happy. ...or by "high-end" did you mean
"audiophool" class? ;-)

 

[[email protected]]

Still very common in amplified speaker sets
to use with computers or MP3 players.

MP3 players? My iPod doesn't have a pot. ;-)

Cheap alarm clock radios still use pots.

Google on "digital potentiometer".
I just got got "About 1,540,000 results".

"Digital potentiometer" is one of the devices one uses to avoid pots.
;-)

 

[Greegor]

G > Google on "digital potentiometer".
G > I just got got "About 1,540,000 results".

krw > "Digital potentiometer" is one of
krw > the devices one uses to avoid pots.
krw > ;-)

I assume they don't all work exactly the same.
How many of them work like voltage dividers
and could be subbed in for older pots?
There are others that are not just voltage dividers, right?

It occurs to me that some are probably designed
to work with rotary encoders rather than
simple up/down buttons, too.

Through a uP they can function as either
linear or audio taper, I suppose.

Do any have setpoints that don't get lost
each time the device powers down?

 

[Artem]

Do any have setpoints that don't get lost

each time the device powers down?

MCP4021

 

[petrus bitbyter]

Still very common in amplified speaker sets
to use with computers or MP3 players.

Cheap alarm clock radios still use pots.

Google on "digital potentiometer".
I just got got "About 1,540,000 results".

Most of the chips for that are just over a buck.

Some of those are for rotary controls
but some others are for up/down buttons.

Some of these chips appear to be made
to drop in place of variable resistors,
while some others seem to be integrated
into amplifiers.

If you've already got a uC it can be
done without such a chip using two
input lines w/ buttons.

Expect production levels of carbon
potentiometers to stabilize at a
very low level (specialty item)
because of fewer uses.

One big plus is that lots of these
digital potentiometers work with
remote control input.

Oh, there are still pots and there will be pots for quite some time. But
when I have to ring a bell for every pot that was replaced by electronics I
would be deaf long before I was done.

petrus bitbyter

 

[petrus bitbyter]

I have a JVC radio + CD player in my office that has a motor driven
pot for the volume control when you use the remote ;-)

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

A good old analog pot cannot be beaten that easily. Not for serious audio
that is

petrus bitbyter

 

[[email protected]]

A good old analog pot cannot be beaten that easily. Not for serious audio that is petrus bitbyter

And now legal in Colorado.
Mark

 

[[email protected]]

Do any have setpoints that don't get lost

each time the device powers down?

yes

 

[Greegor]

A good old analog pot cannot be beaten that easily. Not for serious audio that is petrus bitbyter

mako > And now legal in Colorado.

Didn't the state of Washington legalize pot also?

 

[[email protected]]

G > Google on "digital potentiometer".
G > I just got got "About 1,540,000 results".

krw > "Digital potentiometer" is one of
krw > the devices one uses to avoid pots.
krw > ;-)

I assume they don't all work exactly the same.
How many of them work like voltage dividers
and could be subbed in for older pots?
There are others that are not just voltage dividers, right?

A digital potentiometer is just that. It has a resistor and a wiper;
a three terminal device.

It occurs to me that some are probably designed
to work with rotary encoders rather than
simple up/down buttons, too.

Through a uP they can function as either
linear or audio taper, I suppose.

Do any have setpoints that don't get lost
each time the device powers down?

Yes.

 

[[email protected]]

Hi all



I once read an article on how potentiometers are replaced in todays electronic, by digatal ways....



Does this ring a bell for anyone?

I noticed the MCP4201 here, which recalls its position - that is what I need.
For eg LM335 I need this, as the LM335 is not as exact as one might want - even the 1 degree version
Or if I use an NTC.

Then again, I could just test is and tell my uP that minimum is 0x04 and maximum is 0xe7 and it will calculate from there

Does this change your opinions?

 

[Greegor]

I noticed the MCP4201 here, which recalls its position - that is what I need.

For eg LM335 I need this, as the LM335 is not as exact as one might want - even the 1 degree version

Or if I use an NTC.

Then again, I could just test is and tell my uP that minimum is 0x04 and maximum is 0xe7 and it will calculate from there

Does this change your opinions?

No.