Where to find Rotary Potentiometers????

[whit3rd]

On Dec 7, 4:10 pm, lerameur <leram...@yahoo.com> wrote:

Well my main concern here is to find an actual part with detents in it
at digikey  or mouser. It would be easier to get a linear Pot with
detents

If you want a selector switch of some size and with some number
of detents, usually one gets a wafer switch shaft + detents
as one part, a switch wafer with appropriate contacts for some kind
of switch function (or functions) and then gets a bezel printed
for the box the switch mounts to, and a knob with suitable
appearance, and assembles shaft, stops (see, there might only
be 6 and 10 position assemblies, but you can get 8 positions
by installing a stop on the 10-position model), spacers, wafer
or wafers, until the function is complete.

The cost gets high, but for some functions (like, multikilovolt
switching or o-scope fancy selectors) it's the only game in town.
Mainly, nowadays, you see menu buttons and a small
display of the function, instead.

 

[krw@att.bizzzzzzzzzzzz]

On Tue, 7 Dec 2010 19:38:02 -0800 (PST), George Herold <ggherold@gmail.com>
wrote:

On Dec 7, 7:35 pm, "k...@att.bizzzzzzzzzzzz" <k...@att.bizzzzzzzzzzzz
wrote:
On Tue, 7 Dec 2010 16:10:30 -0800 (PST), lerameur <leram...@yahoo.com> wrote:
On Dec 7, 6:17 pm, Jamie
jamie_ka1lpa_not_valid_after_ka1l...@charter.net> wrote:
lerameur wrote:
On Dec 7, 4:44 pm, Rich Webb <bbew...@mapson.nozirev.ten> wrote:

On Tue, 7 Dec 2010 13:05:27 -0800 (PST), lerameur <leram...@yahoo.com
wrote:

On 7 d c, 15:57, Winston <Wins...@BigBrother.net> wrote:

lerameur wrote:

On 7 d c, 13:41, "Greg Neill"<gneil...@MOVEsympatico.ca> wrote:

lerameur wrote:

Hi,
Ok, before I receive 1000 messages telling me to go to digikey,
mouser or your local store..
I am looking for something very specific and cant find it, but I think
I may have the terms mixed up.
I am looking for a rotary 3/4 or 1 turn potentiometer with 6 to 8
'groves' evenly separated around the circumference .... the type of
knob you find on older TV when changing channel .. remember before
the remote control
thanks for pointing in the right direction

The search term you're looking for is "detents".

Example:

http://www.potentiometers.com/alps_rotary.cfm

Check out the RK117L series.

Ok thats good, Thank you. Detent... thats the word
That part you mention . I would need to order 1200... they dont have
it at mouser or digikey.
Although they do have Electromechanical Encoders:
http://ca.mouser.com/ProductDetail/Alpha-Taiwan/RE130F-40-20F-12P/?qs...

Are you thinking of a 'rotary switch'?
http://slotcarillustrated.com/portal/forums/picture.php?albumid=79&pi...

--Winston- Masquer le texte des messages pr c dents -

- Afficher le texte des messages pr c dents -

yes, I think I mentionned it earlier. The problem is to find one with
'detents' (8 detents would be great)

You mean like this?
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=GH72...

As to how they work, they simply connect common to the indicated pin(s)
as an octal encoder, in the usual sequence 000, 001, 010, ... except
that they're often setup as active low against pull-ups so the "reading"
would be 111, 110, 101, ...

--
Rich Webb Norfolk, VA- Hide quoted text -

- Show quoted text -

Thats great too. but maybe a bit small . I need this button to be the
main selector switch for my product, the box is a metal case 12in by
12in, and 4in high.

K

Use a Uc that has a basic ADC in it, and simply use a 8 pos rotary
switch with a resistor string on it to select from .. ..
The wiper would be the ADC input of course..- Hide quoted text -

- Show quoted text -

Well my main concern here is to find an actual part with detents in it
at digikey  or mouser. It would be easier to get a linear Pot with
detents and do an ADC from the microcontroller, but I have not seen
them on either sites. These use to be about 2-3$, where as the
encoders I saw some at 30$ , that might be too much for a switch.

We use optical encoders that have rather nice detents.  They're expensive
(about $13 in quantity, but that includes a push switch) but they have very
nice tactile feedback.  Mechanical quadrature encoders are around, too.  As
long as you have a UC, these shouldn't be too tough to use (we use a dedicated
encoder chip, but that was done before my time).- Hide quoted text -

- Show quoted text -

This thread is ... anyway Grayhill makes all sorts of nice rotary
switches. You can get onesies for ~$13. (50, 51 series.)

We use Bourns, but Grayhill is a bit cheaper (may be because they want the
business). Like I said, we have the additional switch and a few other bells.

 

[George Herold]

On Dec 7, 7:35 pm, "k...@att.bizzzzzzzzzzzz" <k...@att.bizzzzzzzzzzzz>
wrote:

On Tue, 7 Dec 2010 16:10:30 -0800 (PST), lerameur <leram...@yahoo.com> wrote:
On Dec 7, 6:17 pm, Jamie
jamie_ka1lpa_not_valid_after_ka1l...@charter.net> wrote:
lerameur wrote:
On Dec 7, 4:44 pm, Rich Webb <bbew...@mapson.nozirev.ten> wrote:

On Tue, 7 Dec 2010 13:05:27 -0800 (PST), lerameur <leram...@yahoo.com
wrote:

On 7 d c, 15:57, Winston <Wins...@BigBrother.net> wrote:

lerameur wrote:

On 7 d c, 13:41, "Greg Neill"<gneil...@MOVEsympatico.ca> wrote:

lerameur wrote:

Hi,
Ok, before I receive 1000 messages telling me to go to digikey,
mouser or your local store..
I am looking for something very specific and cant find it, but I think
I may have the terms mixed up.
I am looking for a rotary 3/4 or 1 turn potentiometer with 6 to 8
'groves' evenly separated around the circumference .... the type of
knob you find on older TV when changing channel .. remember before
the remote control
thanks for pointing in the right direction

The search term you're looking for is "detents".

Example:

http://www.potentiometers.com/alps_rotary.cfm

Check out the RK117L series.

Ok thats good, Thank you. Detent... thats the word
That part you mention . I would need to order 1200... they dont have
it at mouser or digikey.
Although they do have Electromechanical Encoders:
http://ca.mouser.com/ProductDetail/Alpha-Taiwan/RE130F-40-20F-12P/?qs...

Are you thinking of a 'rotary switch'?
http://slotcarillustrated.com/portal/forums/picture.php?albumid=79&pi...

--Winston- Masquer le texte des messages pr c dents -

- Afficher le texte des messages pr c dents -

yes, I think I mentionned it earlier. The problem is to find one with
'detents' (8 detents would be great)

You mean like this?
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=GH72...

As to how they work, they simply connect common to the indicated pin(s)
as an octal encoder, in the usual sequence 000, 001, 010, ... except
that they're often setup as active low against pull-ups so the "reading"
would be 111, 110, 101, ...

--
Rich Webb Norfolk, VA- Hide quoted text -

- Show quoted text -

Thats great too. but maybe a bit small . I need this button to be the
main selector switch for my product, the box is a metal case 12in by
12in, and 4in high.

K

Use a Uc that has a basic ADC in it, and simply use a 8 pos rotary
switch with a resistor string on it to select from .. ..
The wiper would be the ADC input of course..- Hide quoted text -

- Show quoted text -

Well my main concern here is to find an actual part with detents in it
at digikey  or mouser. It would be easier to get a linear Pot with
detents and do an ADC from the microcontroller, but I have not seen
them on either sites. These use to be about 2-3$, where as the
encoders I saw some at 30$ , that might be too much for a switch.

We use optical encoders that have rather nice detents.  They're expensive
(about $13 in quantity, but that includes a push switch) but they have very
nice tactile feedback.  Mechanical quadrature encoders are around, too.  As
long as you have a UC, these shouldn't be too tough to use (we use a dedicated
encoder chip, but that was done before my time).- Hide quoted text -

- Show quoted text -

This thread is ... anyway Grayhill makes all sorts of nice rotary
switches. You can get onesies for ~$13. (50, 51 series.)

George H.

 

[John Fields]

On Tue, 07 Dec 2010 18:48:17 -0600, John Fields
<jfields@austininstruments.com> wrote:

On Tue, 7 Dec 2010 13:42:32 -0800 (PST), lerameur <lerameur@yahoo.com
wrote:

On Dec 7, 4:33 pm, Winston <Wins...@BigBrother.net> wrote:
lerameur wrote:

(...)

humm  a ok  I took a better look at your diagram.  well as long as I
can allow the user to do a choice of 8 selection, AND then the
microcontroller can read the selected choice, then I am happy.

http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=1114210&k=ro...

Select your parameters and click 'Apply Filters' or 'Reset' if
you want to start over.

They claim to have 30 different varieties of 8 position
rotary switches.  Perhaps you will find one suitable.



--Winston

cool thanks. I just realize, I would need 8 ports on microcontroler to
determine the position !! I guess now I need a parallel to serial
IC , OR add different resistance to each leg of the switch and read
analog to one Microcontroller pin. Any other suggestion for reading
the rotary switch?

---
These days, trying to find a panel mounted 8 position rotary switch
with a 3 bit binary output is like looking for hen's teeth.

A single-pole 8 position switch should be easy to find, however, and I
like your slick idea of using a single port and the microcontroller's
ADC to do the switching.

Cheap and easy, that's the ticket!

In order to do that, all you'd have to do would be to set up a voltage
divider string and connect it to the switch, like this: (View in
Courier)

5.00 4.29 3.57 2.86 2.14 1.43 0.715 0.0
/ / / / / / / /
Vcc>-+-[R7]-+-[R6]-+-[R5]-+-[R4]-+-[R3]-+-[R2]-+-[R1]-+-GND
| | | | | | | |
O O O O O O O O
^
|
o--> TO ADC IN


The numbers above the resistors are voltages and are predicated based
upon using a 5V supply and 715 ohm 1% resistors in the string.

Assuming that you have at least an 8 bit ADC available you could
easily populate the string with jellybean 5% resistors.

---
If the resistors are all the same value, the voltages shown above will
vary only depending on the tolerances of the resistors, which you'll
need to take into account when determining the location and width of
the detection window.

For the switch, Digikey has an Electroswitch C5P0112N-A for around
$5.36 in the quantities you're looking for:

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=451-1027-ND

---
JF

 

[John Fields]

On Wed, 8 Dec 2010 05:40:35 -0800 (PST), lerameur <lerameur@yahoo.com>
wrote:

On Dec 7, 8:34 pm, whit3rd <whit...@gmail.com> wrote:
On Dec 7, 4:10 pm, lerameur <leram...@yahoo.com> wrote:

Well my main concern here is to find an actual part with detents in it
at digikey  or mouser. It would be easier to get a linear Pot with
detents

If you want a selector switch of some size and with some number
of detents, usually one gets a wafer switch shaft + detents
as one part, a switch wafer with appropriate contacts for some kind
of switch function (or functions) and then gets a bezel printed
for the box the switch mounts to, and a knob with suitable
appearance, and assembles shaft, stops (see, there might only
be 6 and 10 position assemblies, but you can get 8 positions
by installing a stop on the 10-position model), spacers, wafer
or wafers, until the function is complete.

The cost gets high, but for some functions (like, multikilovolt
switching or o-scope fancy selectors) it's the only game in town.
Mainly, nowadays, you see menu buttons and a small
display of the function, instead.

Can you give me some places or sites where they do Bezel prints...
google is getting me tons of watches for my searches output !!!!!

---
In the quantities you're talking about you should probably get the
panel silk-screened.

---
JF

 

[lerameur]

On Dec 7, 11:08 pm, "k...@att.bizzzzzzzzzzzz"
<k...@att.bizzzzzzzzzzzz> wrote:

On Tue, 7 Dec 2010 19:38:02 -0800 (PST), George Herold <ggher...@gmail.com
wrote:





On Dec 7, 7:35 pm, "k...@att.bizzzzzzzzzzzz" <k...@att.bizzzzzzzzzzzz
wrote:
On Tue, 7 Dec 2010 16:10:30 -0800 (PST), lerameur <leram...@yahoo.com> wrote:
On Dec 7, 6:17 pm, Jamie
jamie_ka1lpa_not_valid_after_ka1l...@charter.net> wrote:
lerameur wrote:
On Dec 7, 4:44 pm, Rich Webb <bbew...@mapson.nozirev.ten> wrote:

On Tue, 7 Dec 2010 13:05:27 -0800 (PST), lerameur <leram...@yahoo..com
wrote:

On 7 d c, 15:57, Winston <Wins...@BigBrother.net> wrote:

lerameur wrote:

On 7 d c, 13:41, "Greg Neill"<gneil...@MOVEsympatico.ca> wrote:

lerameur wrote:

Hi,
Ok, before I receive 1000 messages telling me to go to digikey,
mouser or your local store..
I am looking for something very specific and cant find it, but I think
I may have the terms mixed up.
I am looking for a rotary 3/4 or 1 turn potentiometer with 6 to 8
'groves' evenly separated around the circumference .... the type of
knob you find on older TV when changing channel .. remember before
the remote control
thanks for pointing in the right direction

The search term you're looking for is "detents".

Example:

http://www.potentiometers.com/alps_rotary.cfm

Check out the RK117L series.

Ok thats good, Thank you. Detent... thats the word
That part you mention . I would need to order 1200... they dont have
it at mouser or digikey.
Although they do have Electromechanical Encoders:
http://ca.mouser.com/ProductDetail/Alpha-Taiwan/RE130F-40-20F-12P/?qs...

Are you thinking of a 'rotary switch'?
http://slotcarillustrated.com/portal/forums/picture.php?albumid=79&pi...

--Winston- Masquer le texte des messages pr c dents -

- Afficher le texte des messages pr c dents -

yes, I think I mentionned it earlier. The problem is to find one with
'detents' (8 detents would be great)

You mean like this?
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=GH72...

As to how they work, they simply connect common to the indicated pin(s)
as an octal encoder, in the usual sequence 000, 001, 010, ... except
that they're often setup as active low against pull-ups so the "reading"
would be 111, 110, 101, ...

--
Rich Webb Norfolk, VA- Hide quoted text -

- Show quoted text -

Thats great too. but maybe a bit small . I need this button to be the
main selector switch for my product, the box is a metal case 12in by
12in, and 4in high.

K

Use a Uc that has a basic ADC in it, and simply use a 8 pos rotary
switch with a resistor string on it to select from .. ..
The wiper would be the ADC input of course..- Hide quoted text -

- Show quoted text -

Well my main concern here is to find an actual part with detents in it
at digikey or mouser. It would be easier to get a linear Pot with
detents and do an ADC from the microcontroller, but I have not seen
them on either sites. These use to be about 2-3$, where as the
encoders I saw some at 30$ , that might be too much for a switch.

We use optical encoders that have rather nice detents. They're expensive
(about $13 in quantity, but that includes a push switch) but they have very
nice tactile feedback. Mechanical quadrature encoders are around, too. As
long as you have a UC, these shouldn't be too tough to use (we use a dedicated
encoder chip, but that was done before my time).- Hide quoted text -

- Show quoted text -

This thread is ... anyway Grayhill makes all sorts of nice rotary
switches.  You can get onesies for ~$13. (50, 51 series.)

We use Bourns, but Grayhill is a bit cheaper (may be because they want the
business).  Like I said, we have the additional switch and a few other bells.- Hide quoted text -

- Show quoted text -

Thanks for he help, I will go to the local electronics/mini scrap
yard/store to see what they might have. I have a few options now,
thanks

K

 

[lerameur]

On Dec 7, 8:34 pm, whit3rd <whit...@gmail.com> wrote:

On Dec 7, 4:10 pm, lerameur <leram...@yahoo.com> wrote:

Well my main concern here is to find an actual part with detents in it
at digikey  or mouser. It would be easier to get a linear Pot with
detents

If you want a selector switch of some size and with some number
of detents, usually one gets a wafer switch shaft + detents
as one part, a switch wafer with appropriate contacts for some kind
of switch function (or functions) and then gets a bezel printed
for the box the switch mounts to, and a knob with suitable
appearance, and assembles shaft, stops (see, there might only
be 6 and 10 position assemblies, but you can get 8 positions
by installing a stop on the 10-position model), spacers, wafer
or wafers, until the function is complete.

The cost gets high, but for some functions (like, multikilovolt
switching or o-scope fancy selectors) it's the only game in town.
Mainly, nowadays, you see menu buttons and a small
display of the function, instead.

Can you give me some places or sites where they do Bezel prints...
google is getting me tons of watches for my searches output !!!!!

K

 

[Peter Bennett]

On Wed, 8 Dec 2010 05:40:35 -0800 (PST), lerameur <lerameur@yahoo.com>
wrote:

Can you give me some places or sites where they do Bezel prints...
google is getting me tons of watches for my searches output !!!!!

K

Try http://www.frontpanelexpress.com/index.html - they'll make the
complete panel to your design, including holes and labels.


--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca

 

[John Fields]

On Wed, 8 Dec 2010 09:36:51 -0800 (PST), lerameur <lerameur@yahoo.com>
wrote:

On Dec 8, 9:07 am, John Fields <jfie...@austininstruments.com> wrote:
On Wed, 8 Dec 2010 05:40:35 -0800 (PST), lerameur <leram...@yahoo.com
wrote:





On Dec 7, 8:34 pm, whit3rd <whit...@gmail.com> wrote:
On Dec 7, 4:10 pm, lerameur <leram...@yahoo.com> wrote:

Well my main concern here is to find an actual part with detents in it
at digikey or mouser. It would be easier to get a linear Pot with
detents

If you want a selector switch of some size and with some number
of detents, usually one gets a wafer switch shaft + detents
as one part, a switch wafer with appropriate contacts for some kind
of switch function (or functions) and then gets a bezel printed
for the box the switch mounts to, and a knob with suitable
appearance, and assembles shaft, stops (see, there might only
be 6 and 10 position assemblies, but you can get 8 positions
by installing a stop on the 10-position model), spacers, wafer
or wafers, until the function is complete.

The cost gets high, but for some functions (like, multikilovolt
switching or o-scope fancy selectors) it's the only game in town.
Mainly, nowadays, you see menu buttons and a small
display of the function, instead.

Can you give me some places or sites where they do Bezel prints...
google is getting me tons of watches for my searches output  !!!!!

---
In the quantities you're talking about you should probably get the
panel silk-screened.

---
JF- Hide quoted text -

- Show quoted text -

Any preferred web site or links on tutorials on this silk screened
process?

K

---
Google "silkscreen" without the quotes.

---
JF

 

[lerameur]

On Dec 8, 9:07 am, John Fields <jfie...@austininstruments.com> wrote:

On Wed, 8 Dec 2010 05:40:35 -0800 (PST), lerameur <leram...@yahoo.com
wrote:





On Dec 7, 8:34 pm, whit3rd <whit...@gmail.com> wrote:
On Dec 7, 4:10 pm, lerameur <leram...@yahoo.com> wrote:

Well my main concern here is to find an actual part with detents in it
at digikey or mouser. It would be easier to get a linear Pot with
detents

If you want a selector switch of some size and with some number
of detents, usually one gets a wafer switch shaft + detents
as one part, a switch wafer with appropriate contacts for some kind
of switch function (or functions) and then gets a bezel printed
for the box the switch mounts to, and a knob with suitable
appearance, and assembles shaft, stops (see, there might only
be 6 and 10 position assemblies, but you can get 8 positions
by installing a stop on the 10-position model), spacers, wafer
or wafers, until the function is complete.

The cost gets high, but for some functions (like, multikilovolt
switching or o-scope fancy selectors) it's the only game in town.
Mainly, nowadays, you see menu buttons and a small
display of the function, instead.

Can you give me some places or sites where they do Bezel prints...
google is getting me tons of watches for my searches output  !!!!!

---
In the quantities you're talking about you should probably get the
panel silk-screened.

---
JF- Hide quoted text -

- Show quoted text -

Any preferred web site or links on tutorials on this silk screened
process?

K

 

[lerameur]

On Dec 8, 12:58 pm, John Fields <jfie...@austininstruments.com> wrote:

On Wed, 8 Dec 2010 09:36:51 -0800 (PST), lerameur <leram...@yahoo.com
wrote:





On Dec 8, 9:07 am, John Fields <jfie...@austininstruments.com> wrote:
On Wed, 8 Dec 2010 05:40:35 -0800 (PST), lerameur <leram...@yahoo.com
wrote:

On Dec 7, 8:34 pm, whit3rd <whit...@gmail.com> wrote:
On Dec 7, 4:10 pm, lerameur <leram...@yahoo.com> wrote:

Well my main concern here is to find an actual part with detents in it
at digikey or mouser. It would be easier to get a linear Pot with
detents

If you want a selector switch of some size and with some number
of detents, usually one gets a wafer switch shaft + detents
as one part, a switch wafer with appropriate contacts for some kind
of switch function (or functions) and then gets a bezel printed
for the box the switch mounts to, and a knob with suitable
appearance, and assembles shaft, stops (see, there might only
be 6 and 10 position assemblies, but you can get 8 positions
by installing a stop on the 10-position model), spacers, wafer
or wafers, until the function is complete.

The cost gets high, but for some functions (like, multikilovolt
switching or o-scope fancy selectors) it's the only game in town.
Mainly, nowadays, you see menu buttons and a small
display of the function, instead.

Can you give me some places or sites where they do Bezel prints...
google is getting me tons of watches for my searches output !!!!!

---
In the quantities you're talking about you should probably get the
panel silk-screened.

---
JF- Hide quoted text -

- Show quoted text -

Any preferred web site or links on tutorials on this silk screened
process?

K

---
Google "silkscreen" without the quotes.

---
JF- Hide quoted text -

- Show quoted text -

Wow that look good, can they make the entire box in 2 or three parts ?
any other companies you know?

well google keep giving the web sites from artist who paints on their
t-shirt or silk.... http://www.instructables.com/id/How-to-Silk-Screen/

K

 

[Bob Masta]

On Wed, 8 Dec 2010 05:40:35 -0800 (PST), lerameur
<lerameur@yahoo.com> wrote:

Can you give me some places or sites where they do Bezel prints...
google is getting me tons of watches for my searches output !!!!!

I have seen very nice font panels made by laser printing
onto adhesive-backed clear plastic. You may need to spray
on a coat of clear protective lacquer since the laser toner
is not as durable as true silk-screened paint.

Best regards,



Bob Masta

DAQARTA v5.10
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Sound Level Meter
Frequency Counter, FREE Signal Generator
Pitch Track, Pitch-to-MIDI
DaqMusic - FREE MUSIC, Forever!
(Some assembly required)
Science (and fun!) with your sound card!

 

[Jasen Betts]

On 2010-12-09, Bob Masta <N0Spam@daqarta.com> wrote:

On Wed, 8 Dec 2010 05:40:35 -0800 (PST), lerameur
lerameur@yahoo.com> wrote:

Can you give me some places or sites where they do Bezel prints...
google is getting me tons of watches for my searches output !!!!!

I have seen very nice font panels made by laser printing
onto adhesive-backed clear plastic. You may need to spray
on a coat of clear protective lacquer since the laser toner
is not as durable as true silk-screened paint.

print a mirror image on a clear acetate sheet and then spray
2 coats of "appliance white" and one coat of contact adhesive
to the same side. (allow to dry between coats)

--
⚂⚃ 100% natural