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Tiny Solenoid

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Sam - 28 Apr 2006 19:10 GMT
X-No-Archive

Hey, I'm new here and I hope I'm posting in the most relevant group.

I'm looking for a way to create a tiny vibration. I'm guessing that the
easiest way to do this is with a little solenoid that I activate at the
frequency of my choosing. I've never used a solenoid though, and am
pretty new to electronics so I am kind of lost.

I looked on mouser and digikey, but most of what I saw was fairly high
voltage and way out of my price range. I'm looking for something about
the size of a pencil eraser that only needs 3 volts and costs as little
as possible.

Can anybody point me in the right direction? Maybe I'm searching for
the wrong thing...

Thanks
Sam
Tim Auton - 28 Apr 2006 19:44 GMT
>Hey, I'm new here and I hope I'm posting in the most relevant group.
>
>I'm looking for a way to create a tiny vibration. I'm guessing that the
>easiest way to do this is with a little solenoid that I activate at the
>frequency of my choosing. I've never used a solenoid though, and am
>pretty new to electronics so I am kind of lost.

How tiny a vibration? What does it have to move? Over what range of
frequencies?

You might look at small speakers, perhaps in-ear headphones, for a
small and cheap 'actuator'. You won't get much force or amplitude from
one, but they do make tiny vibrations and work with low-voltage
inputs.

Tim
Signature

Did I really still have that sig?

Greg Neill - 28 Apr 2006 19:46 GMT
> X-No-Archive
>
[quoted text clipped - 12 lines]
> Can anybody point me in the right direction? Maybe I'm searching for
> the wrong thing...

How about a teensy DC motor with an imbalanced
weight on its rotor?
JeffM - 28 Apr 2006 20:26 GMT
>>X-No-Archive
>> Sam

Putting this in the  BODY of your post has ZERO effect.

>>I'm looking for a way to create a tiny vibration.
>
> How about a teensy DC motor
>with an imbalanced weight on its rotor?
> Greg Neill

That's the 1st thing that came to my mind
http://66.102.9.104/search?q=cache:4L7VvXe6KuMJ:www.allelectronics.com/cgi-bin/i
tem/DCM-204/400/MINIATURE_VIBRATING_MOTOR_.html+site:allelectronics.com+motor+pa
gers

but without any real specs, it's just a SWAG.
jsuntane@gmail.com - 28 Apr 2006 21:46 GMT
X-No-Archive

Thank you for your kind replies. I found a motor on Jameco that looks
perfect for my needs. I'm glad I just asked instead of trying to figure
something out with a bouncing solenoid.

On another note...

JeffM said:
>>X-No-Archive
>> Sam

>Putting this in the  BODY of your post has ZERO effect.

No need to be snotty Jeff. Especially when you're wrong.

Check out
http://groups.google.com/support/bin/answer.py?answer=7918&query=x-no-archive&to
pic=0&type=f


I'll quote from it, "Any post that contains the text "X-No-Archive" in
either the header or the first line of the message (with no additional
text included on that line) will be displayed on Google Groups for only
seven days and won't be searchable after it's removed."

So putting X-No-Archive in the first line of my post had exactly the
effect that I wanted it to.
Sam - 28 Apr 2006 21:53 GMT
X-No-Archive

Sorry about that last message being under someone else's account. I was
on a library computer and submitted it before realizing that someone
had left themselves logged in.

Thank you for your kind replies. I found a motor on Jameco that looks
perfect for my needs. I'm glad I just asked instead of trying to figure
something out with a bouncing solenoid.

On another note...

JeffM said:

>>X-No-Archive
>> Sam
>Putting this in the  BODY of your post has ZERO effect.

No need to be snotty Jeff. Especially when you're wrong.

Check out
http://groups.google.com/support/bin/answer.py?answer=7918&query=x-no...

I'll quote from it, "Any post that contains the text "X-No-Archive" in
either the header or the first line of the message (with no additional
text included on that line) will be displayed on Google Groups for only
seven days and won't be searchable after it's removed."

So putting X-No-Archive in the first line of my post had exactly the
effect that I wanted it to.
Anthony Fremont - 28 Apr 2006 22:27 GMT
> X-No-Archive
>
> Sorry about that last message being under someone else's account. I was
> on a library computer and submitted it before realizing that someone
> had left themselves logged in.

<shakes head>

> Thank you for your kind replies. I found a motor on Jameco that looks
> perfect for my needs. I'm glad I just asked instead of trying to figure
[quoted text clipped - 9 lines]
>
> No need to be snotty Jeff. Especially when you're wrong.

Look who's being snotty now.

> Check out

http://groups.google.com/support/bin/answer.py?answer=7918&query=x-no...

> I'll quote from it, "Any post that contains the text "X-No-Archive" in
> either the header or the first line of the message (with no additional
[quoted text clipped - 3 lines]
> So putting X-No-Archive in the first line of my post had exactly the
> effect that I wanted it to.

But why???? The whole purpose of this is to build a repository of
information that others may find useful in the future.  By doing it
"your way", you are depriving future archive readers of the context of
your post.  Why wouldn't you want to give that tiny thing back to the
very people that you expect to help you now?  Are you just that selfish?
JeffM - 28 Apr 2006 23:32 GMT
>>>X-No-Archive
>>> Sam
[quoted text clipped - 11 lines]
>had exactly the effect that I wanted it to.
> Sam

I acknowledge my error.
I'm used to seeing Google flag these things in bold.
This must be the 1st time I've seen it used
by someone posting from Google.

You should realize that this isn't Google Groups; this is Usenet
and Google Groups is but one way to access Usenet. [1]
There other repositories out there which WILL archive it.
.
.
I agree with Fremont's commentary on selfishness.
.
.
[1] At this point, many will say the inferior way.
Sam - 29 Apr 2006 03:05 GMT
X-No-Archive

Believe me, I understand quite well what usenet is and what google is.
Google might not be the best way to post on usenet, but it certainly is
one of the cheapest.

I'm sorry if I appeared snotty, I was just a little put off by the fact
that I was told I didn't know what I was doing when I knew that I did.
And "<shakes head>" is snotty too Fremont. So here's my most honest,
non-snotty reply:

I'm not trying to stop my posts from being archived everywhere, just
specifically not on google. I know exactly what I'm doing and I don't
see how this is selfish at all, the entire text of my question was
quoted in another message. Any person who is searching for a phrase or
word found in my question will still find Bob's and Tim's posts which
contain inciteful replies. The only thing that I've changed is that
someone searching specifically for posts where I'm the author won't
find the thread. Maybe when I'm applying to a job I might not want my
future employer finding a string of posts where I say I've never worked
with solenoids and ask how to stop an overflowing toilet. Maybe that's
a little selfish, but I don't think it's unreasonable. Please don't
reply to this, this post has gone on far too long already. I'm sorry if
I ruffled anybody, I just wanted to ask a basic electronics question on
sci.electronics.basics.
Phil Allison - 29 Apr 2006 13:02 GMT
"Sam"

> Any person who is searching for a phrase or
> word found in my question will still find Bob's and Tim's posts which
> contain inciteful replies.

** Most replies on usenet are of the "inciteful" kind.

   Shame how few contain any insight.

.......   Phil
Stone Trolled Steve Austin - 29 Apr 2006 23:19 GMT
> X-No-Archive

Isn't it supposed to be x-no-archive: yes?
Anthony Fremont - 29 Apr 2006 23:22 GMT
> > X-No-Archive
>
> Isn't it supposed to be x-no-archive: yes?

Shhh......he already knows what he's doing.  ;-)
Bob Eld - 28 Apr 2006 19:58 GMT
> X-No-Archive
>
[quoted text clipped - 15 lines]
> Thanks
> Sam

A solenoid may not be what you want. Solenoids will produce pull in when
driven regardless of polarity and are not usually used in that manner.While
some vibration may occur they will be very inefficient at producing it. What
frequency do you want to vibrate? Most vibrators like those used in cell
phones and sex toys use an eccentric weight on a small motor and vibrate at
the rate the motor runs. They are efficient.  Check Mouser and Jameco for
"vibrating motors." Jameco has a whole bunch of them both 1.5 and 3VDC.
Bob
 
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