capacitors...

[RickAlty]

Hippy said... <BLOCKQUOTE><font size=1 face=arial>quote:<hr height=1 noshade>I would recommend two 100nF-220nF caps across 0V and 5V <hr height=1 noshade></BLOCKQUOTE></font><font face='Verdana, Arial, Helvetica' size=2>

That would be 100,000 to 220,000 picoFarad, right? (My identification chart for my big grab bag of capacitors is in pico)

Richard

 

[RickAlty]

Anyone know what the value would be for a disk capacitor with just an underlined '1.0' printed on it? (It's about 3/15&quot; in diameter to give an idea of the ballpark we're in)

Richard

 

[MartinM57]

Yes, to the first

To the second...
...its almost certainly not 1pF
...1.0 suggests 1uF, but if it's a thin disk, that's unlikely. If its more of a teardrop then it could be a 1uF tantalum.

Have a look at
http://www.rapidonline.com/products.aspx?tier1=Electronic+Components&amp;tier2=Capacitors
and see which one it fits best!

 

[eclectic]

Richard.

As an outside bet, try halfway down this page.

<A href='http://www.kpsec.freeuk.com/components/capac.htm' Target=_Blank>External Web Link</a>

BUT, to be safe,

<A href='http://www.peakelec.co.uk/acatalog/jz_lcr40.html' Target=_Blank>External Web Link</a>


e.


Edited by - eclectic on 30/07/2006 22:11:10

 

[hippy]

Yes, I was thinking of something like this ...

http://194.201.138.187/WebRoot/Store/Shops/Store_002E_TechSupplies/Products/CAP001/CAP001_m.jpg

a small 6mm x 8mm x 2mm ( or so ) plastic block, usually with &quot;100&quot; or similar on top. I alays use 100nF, other people use other values.

 

[bobrayner]

If in doubt and are unable to measure it throw it away and purchase (or otherwise obtain) the component you need. It may not even be a capacitor. some small inductors are made like this. If you can get hold of one of those Peak Atlas component analysers do it. Thay are pretty clever, you don't have to know what the mystery component is, just connect it and it will tell you. Very small value wire wound precision resistors as used in older metering circuits can trick it but it will give the restance value and the inductance of the winding.
cheers BobR

 

[manuka]

Strongly recommend grabbing a cheap &quot;do everything&quot; DMM with inbuilt cap. settings, which now abound for &lt;US$20. Although maxing out typically at a few microFarads, they're a goldmine for nF &amp; pF level mystery caps. Look for meters that allow relative measures,so lead &amp; stray caps. can be nulled out. My personal favourite hobbiest DMM is the ~US$30 Jaycar QM1538 <A href='http://www.jaycar.com.au/productView.asp?ID=QM1538 ' Target=_Blank>External Web Link</a>which even has inbuilt serial PC datalogging.