Where to find Rotary Potentiometers????

[lerameur]

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

Ken
(PS actually I should say wireless remote control, I just recall for a
few years they had those wired remote control and everybody in my
family was tripping on this wire..)

 

[Greg Neill]

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.

 

[Winston]

lerameur wrote:

On 7 déc, 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=yA6kp8fx8Y7rb2%2fvm2m6xg%3d%3d

Are you thinking of a 'rotary switch'?
<http://slotcarillustrated.com/portal/forums/picture.php?albumid=79&pictureid=2733>

--Winston

 

[Winston]

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=rotary%20switch

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

 

[lerameur]

On 7 déc, 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=yA6kp8fx8Y7rb2%2fvm2m6xg%3d%3d

K

 

[Rich Webb]

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

On 7 déc, 15:57, Winston <Wins...@BigBrother.net> wrote:
lerameur wrote:
On 7 déc, 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 précédents -

- Afficher le texte des messages précédents -

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=GH7257-ND>

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

 

[Rich Webb]

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
^

3

--
Rich Webb Norfolk, VA

 

[lerameur]

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...

K- Masquer le texte des messages précédents -

- Afficher le texte des messages précédents -

Ok can somebody tell me how these encoders works. They are suppose to
be binary, the datasheet only shows dimensions, Do I need to power
them? howdo I generate digital from the switch?

Maybe that should be another thread !...
K

 

[Tim Wescott]

On 12/07/2010 01:05 PM, lerameur wrote:

On 7 déc, 15:57, Winston<Wins...@BigBrother.net> wrote:
lerameur wrote:
On 7 déc, 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 précédents -

- Afficher le texte des messages précédents -

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

But a potentiometer is a variable resistor, and a switch is -- well -- a
switch. You could put detents on a potentiometer, but it'd still be a
potentiometer. You could build a switch and leave the detents off, but
it'd still be a switch.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html

 

[lerameur]

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

lerameur wrote:
On 7 déc, 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 précédents -

- Afficher le texte des messages précédents -

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

K

 

[Tim Wescott]

On 12/07/2010 12:56 PM, lerameur wrote:

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...

K- Masquer le texte des messages précédents -

- Afficher le texte des messages précédents -

Ok can somebody tell me how these encoders works. They are suppose to
be binary, the datasheet only shows dimensions, Do I need to power
them? howdo I generate digital from the switch?

It depends on the encoder. Those are probably electromechanical,
meaning you don't have to power them up as such. Instead, there'll be
some number of switches (depending on the kind of encoder). If it's an
absolute encoder with binary output, then you'll have as many switches
as needed to encode the number of positions (i.e. an 8-position switch
will have three outputs). If it's an incremental encoder then you'll
have two outputs that go in a grey code, i.e. the switches will progress
through open, open, open, closed, closed, closed and closed, open. This
is enough information to know when the shaft has been moved and by how far.

You really need a complete data sheet, then it'll become clear -- you
may want to take the manufacturer's part number from Mouser, then go to
the manufacturer's site and see if you can find information.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html

 

[lerameur]

On Dec 7, 4:05 pm, lerameur <leram...@yahoo.com> wrote:

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





lerameur wrote:
On 7 déc, 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 précédents -

- Afficher le texte des messages précédents -

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

K- Hide quoted text -

- Show quoted text -

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.

K

 

[lerameur]

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?

K

 

[lerameur]

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

 

[Jamie]

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..

 

[krw@att.bizzzzzzzzzzzz]

On Tue, 7 Dec 2010 16:10:30 -0800 (PST), lerameur <lerameur@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).

 

[Peter Bennett]

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?

K

Use a binary-coded switch like
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=SW222-ND.
They are available with 8, 10, or 16 positions - the 10 and 16
position switches have four outputs (the 8 position version only needs
three outputs), giving the position as a binary code. Typically, you
would ground the common terminal of the switch, and connect the four
outputs to four inputs on your microcontroller, and to four pull-up
resistors to your positive supply.



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

 

[Jamie]

lerameur 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.

K

Is Thumbwheel switches what you're looking for?

in Google "Thumbwheel switches"
http://www.surplussales.com/switches/swthumbw-1.html

 

[John Fields]

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.

---
JF

 

[lerameur]

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.

K