[Noisebridge-discuss] Newbie Question : Help identifying potentiometer

[David Rorex]

There's nothing much special about potentiometers. It's just a variable
resistor. Pretty much any variable resistor about the same range (say 200k -
300k) should work fine in the circuit. You only need a specific one if you
want it to fit into the PCB, since they come in different shapes and sizes.
But if you are rebuilding it from scratch, that's not needed. Bigger ones
are obviously easier to use, since you have a knob you can turn by hand,
whereas the tiny ones need a small screwdriver to adjust (or possibly your
fingernail).

Speaking of cheap parts, it's often much cheaper to buy them in multiples
like 25 or 100. I tend to order things like this from digikey.com, another
distributor similar to jameco. But that's just personal preference. Another
place to get parts for extra cheap are the so called "surplus" sites. Their
selection is much less, and sometimes the deals are not that great, but
sometimes they can be significantly cheaper. Example are
http://allelectronics.com/ and http://goldmine-elec.com/

BTW, in the future, if you have basic electronics questions & don't get an
answer here, try asking at http://chiphacker.com/

-David R
PS: Make Adobe put GPU acceleration for gfx rendering on desktops in Flash
11. Thnx.

On Sun, Jul 25, 2010 at 5:32 PM, Mike Chambers <mikechambers at gmail.com>wrote:

> I have been teaching myself electronics recently, and just found out
> about NoiseBridge. I am doing some very basic electronic circuits, and
> learning how to work with Arduinos (connecting them to Flash /
> ActionScript).
>
> I am going to try to come in for the Arduino class, and the beginner
> electronics class on Monday night. Anyways, I am trying to get some
> parts for a simple project I want to replicate and am having some
> trouble figuring out one of the items. I was hoping maybe someone here
> could help.
>
> I apologize if this is not the appropriate forum for the question.
>
> Basically, I put together this Flashing LED kit (MK102):
>
>
> http://www.designnotes.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=MK102&Category_Code=mik
>
> This is a very simple circuit that blinks two LED lights. I think I
> have a good grasp of how it works, but I want to buy the individual
> parts so I can rebuild it, and modify it a bit to help me understand
> it better.
>
> You can see the diagram here:
>
> https://wiki.ittc.ku.edu/ittc/images/d/d9/Manual_mk102.pdf
>
> I have identified all of the parts (from Jameco), but I cannot figure
> out which potentiometer is in the kit.
>
> The manual just says:
>
> 220k
>
> and the writing on the actual potentiometer is:
>
> 220k 91om (piher spain)
>
> It is a simple potentiometer that you can adjust with a small screw driver.
>
> Can anyone help me find a replacement for it? Or help me figure out
> how to find a suitable replace on my own?
>
> Btw, the individual parts are really cheap, so if it would be helpful,
> I would be happy to purchase extras and donate some kits to
> NoiseBridge. It is a really good, simple circuit for people new to
> electronics.
>
> thanks for any help...
>
> mike
>
> mikechambers at gmail.com
> _______________________________________________
> Noisebridge-discuss mailing list
> Noisebridge-discuss at lists.noisebridge.net
> https://www.noisebridge.net/mailman/listinfo/noisebridge-discuss
>
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