Old 07-24-2008, 08:47 AM #1
pseudolobster's Avatar
Class 3R Laser
 
Join Date: Jan 2008
Location: BC, Canada
Posts: 1,734
Rep Power: 487
pseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond repute
pseudolobster pseudolobster is offline
Class 3R Laser
pseudolobster's Avatar
 
Join Date: Jan 2008
Location: BC, Canada
Posts: 1,734
Rep Power: 487
pseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond reputepseudolobster has a reputation beyond repute
Default Is there any way to diy measure capacitance?

So surface mount capacitors... they're really useful but are never labeled.

Using a multimeter, a stopwatch, a ball of twine, two matchsticks, and a rubber band is there any way to macguyver together some way of identifying blank caps?


__________________
Custom Text
pseudolobster is offline   Reply With Quote


















Old 07-24-2008, 10:42 AM #2
Bionic-Badger's Avatar
Class 4 Laser
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,478
Rep Power: 18104
Bionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond repute
Bionic-Badger Bionic-Badger is online now
Class 4 Laser
Bionic-Badger's Avatar
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,478
Rep Power: 18104
Bionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond repute
Default Re: Is there any way to diy measure capacitance?

Yes you can, but you need to have an oscillator signal source. *Basically what happens is you construct a signal filter using a resistor and capacitor, and measure the attentuation of that filter at certain frequencies. *Using the resistor value and filter response, you can work out the value of the capacitor. It works with inductors too.

It's a bit easier if you use a sound-card to both source the signals and measure the input. *I once saw a program that did this for you automatically, but I can't find it.

__________________
You must spread some Reputation around before giving it to <person> again.
Bionic-Badger is online now   Reply With Quote
Old 07-24-2008, 01:09 PM #3
laserguys
Guest
 
Posts: n/a
laserguys
Guest
 
Posts: n/a
Default Re: Is there any way to diy measure capacitance?

You can pickup a capacitor checking Multi Meter on eBay for less than $16.00 delivered. And you end up this a full function DMM to boot.

Here are two I found real quick. The first one seems a bit better.

Sorry I don't have enough posts to insert a link.

httX//cgi.ebay.ca/Multi-Function-Digital-Multimeter-Capacitance-Tester-DC_W0QQitemZ290246782712QQihZ019QQcategoryZ42291QQ ssPageNameZWDVWQQrdZ1QQcmdZViewItem

httX://cgi.ebay.ca/Slim-Multi-Meter-Function-Digital-Capacitance-Tester-DC_W0QQitemZ300243483915QQihZ020QQcategoryZ42291QQ ssPageNameZWDVWQQrdZ1QQcmdZViewItem

Just fix the &quot;httX&quot;

Hope this helps.
  Reply With Quote
Old 07-24-2008, 02:05 PM #4
laserguys
Guest
 
Posts: n/a
laserguys
Guest
 
Posts: n/a
Default Re: Is there any way to diy measure capacitance?

Sorry, forget the 2nd one it has no cap checking.
This one is the better one at $15.98 delivered.

http://cgi.ebay.ca/Multi-Function-Di...QQcmdZViewItem
  Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 07:30 PM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC