1. Home
  2. Electronics Design
  3. Where can I buy this movement?

Where can I buy this movement?

Where can I buy this movement?

I'm looking for just the guts of a Stewart-Warner-style two coil pointer driver... just the mechanism, no case, dial, or anything.

I'm trying to make my nice stone outdoor thermometer sun-proof, by sensing the temperature elsewhere ;-) ...Jim Thompson

-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

formatting link
| 1962 |

Reply to
Jim Thompson
Loading thread data ...

Go to the auto parts store, buy a gauge that uses that movement, then take it apart.

--

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

I'm looking for work -- see my website!
Reply to
Tim Wescott

Have you priced them? Try $90 :-(

Might have to try winding my own ;-) ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     |
Reply to
Jim Thompson

Den tirsdag den 6. december 2016 kl. 23.40.44 UTC+1 skrev Jim Thompson:

formatting link

?
Reply to
Lasse Langwadt Christensen

Thanks, Lasse.

I wonder... is there such a thing as a two-pole PM motor? They're in textbooks... real life ?:-) ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     |
Reply to
Jim Thompson

Alternatively: Is there a ready-made stepper type assembly that I can feed bits defining the angle and have the rotor go to that angle? ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     |
Reply to
Jim Thompson

Look for GM instrument replacement steppers. They are incremental, of course, so you have to zero them then step to the desired angle.

--sp

--
Best regards,  
Spehro Pefhany 
Amazon link for AoE 3rd Edition:            http://tinyurl.com/ntrpwu8
Reply to
Spehro Pefhany

Radio-Controlled servo motors might fit the bill...

John :-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup) 
John's  Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) 
                      www.flippers.com 
        "Old pinballers never die, they just flip out."
Reply to
John Robertson

if used as is they need to be powered all the time, they tend to move when powered up.

but i guess you could just open one up and connect directly to the motor and potmeter

Reply to
Lasse Langwadt Christensen

Any way to control them without a uP ?:-( I speak only analog... I farm out digital... this is a G-job. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     |
Reply to
Jim Thompson

movement. Can that be had? ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| STV, Queen Creek, AZ 85142    Skype: skypeanalog |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     |
Reply to
Jim Thompson

eBay or Craigslist may net you some joy.

--
Tim Wescott 
Control systems, embedded software and circuit design 
I'm looking for work!  See my website if you're interested 
http://www.wescottdesign.com
Reply to
Tim Wescott

Sure, just get a big compass. Treat it as a compass-repeater problem.

A permanent magnet, four N poles, four S poles made from iron, and a little AC applied selectively to the arms (to cause saturation) will steer a compa ss nicely.

Reply to
whit3rd

Don't think so. Even the Sail winch servos are only 140 degrees.

Cheers

Reply to
Martin Riddle

:

can

hen powered up.

r and potmeter

If Jim goes to the trouble of using a stepper motor to do his job, 360 degr ees is a given, but he will have to work out a way initially setting an abs olute orientation.

formatting link

lists a rotary encoder with a 4-bit absolute output - 22.5 degree steps.It' s a Grayhill 25LB22-H and not all that cheap, but there are lots of parts lik e it around.

--
Bill Sloman, Sydney
Reply to
bill.sloman

The last time I saw one of those I had just built it from nails and bell wire.

--
www.wescottdesign.com 


----Android NewsGroup Reader---- 
http://usenet.sinaapp.com/
Reply to
Tim Wescott

Many of the aircraft ADF indicators are using a two-phase motor to turn the pointer. Another possibility is a resolver (two-phase synchro) with rotor fed with DC.

--

-TV
Reply to
Tauno Voipio

Jim Thompson prodded the keyboard with:

Would a Selsyn pair work. Basically a pair of motors connected so that when one moves/rotates the other one follows it.

--
Best Regards: 
                      Baron.
Reply to
Baron

A motorised volume potentiometer

next you'll be wanting a linear track on the pot...

--
This email has not been checked by half-arsed antivirus software
Reply to
Jasen Betts

Sure you can. Servo City sells some with continuous rotation, even. RC servos rock.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs 
Principal Consultant 
ElectroOptical Innovations LLC 
Optics, Electro-optics, Photonics, Analog Electronics 

160 North State Road #203 
Briarcliff Manor NY 10510 

hobbs at electrooptical dot net 
http://electrooptical.net
Reply to
Phil Hobbs

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.