madbeanpedals::forum

Projects => General Questions => Topic started by: slimtriggers on November 13, 2011, 01:53:30 AM

Title: Help ID this cap...
Post by: slimtriggers on November 13, 2011, 01:53:30 AM
I think it's 47pF with a 10% tolerance, but I want to be sure before I order them. 

Thanks in advance for your help ;)
Title: Re: Help ID this cap...
Post by: jkokura on November 13, 2011, 04:37:26 AM
That looks right, but you couldn't pay me to take a cap in that condition.

jacob
Title: Re: Help ID this cap...
Post by: slimtriggers on November 13, 2011, 04:57:06 AM
 :D  Thanks.  That's one that's being replaced.  There were four of them that looked very suspicious. 
Title: Re: Help ID this cap...
Post by: jkokura on November 13, 2011, 05:31:54 AM
Ah, yeah. if you're ordering to replace that, I'd go with 47R. You can always measure caps if you're curious and have a Multi Meter that does Capacitance. That's what I do.

Jacob
Title: Re: Help ID this cap...
Post by: slimtriggers on November 13, 2011, 03:33:19 PM
My DMM doesn't do capacitance.  I'm seriously considering one of the capacitance meter kits, though.
Title: Re: Help ID this cap...
Post by: bigmufffuzzwizz on November 15, 2011, 07:47:08 PM
That kit is probably the only cap tester your gonna find that will measure values that small for that price. My meter doesn't really measure below 1nf very well. The kit will measure 1 pf!
Title: Re: Help ID this cap...
Post by: slimtriggers on November 16, 2011, 12:51:38 AM
I pulled the trigger on the kit yesterday.  Looking forward to trying it out 8)
Title: Re: Help ID this cap...
Post by: jkokura on November 16, 2011, 01:08:20 AM
Yeah, I think I'll be picking it up too. Probably a resistor one also. Easier than pulling out my DMM, as I don't have alligator clip leads for it and that makes checking a part VERY hard.
Title: Re: Help ID this cap...
Post by: gtr2 on November 17, 2011, 01:43:52 PM
One thing on the capacitance tester kit.  The pin is a 2.5mm center positive if you're going to use an adapter.  If I remember right anything 9-12v is acceptable.

Josh
Title: Re: Help ID this cap...
Post by: slimtriggers on November 17, 2011, 09:39:20 PM
Quote from: gtr2 on November 17, 2011, 01:43:52 PM
One thing on the capacitance tester kit.  The pin is a 2.5mm center positive if you're going to use an adapter.  If I remember right anything 9-12v is acceptable.

Josh

Thanks!  I'd be VERY surprised if I don't have a wall wart lying around that will work.  It's ridiculous how many of those things I have :D
Title: Re: Help ID this cap...
Post by: melody_guitar on November 21, 2011, 05:23:09 AM
I bet its a 47 picofarad value of ceramic capacitor..
Title: Re: Help ID this cap...
Post by: nzCdog on November 21, 2011, 07:38:18 AM
This Kit? (http://www.sparkfun.com/products/9485)
Cool... my DMM does capacitance but not particularly accurately I suspect... looks like a good buy!
Title: Re: Help ID this cap...
Post by: slimtriggers on November 22, 2011, 04:44:34 AM
Quote from: nzCdog on November 21, 2011, 07:38:18 AM
This Kit? (http://www.sparkfun.com/products/9485)
Cool... my DMM does capacitance but not particularly accurately I suspect... looks like a good buy!

That's the one.  I found it on Ebay for a bit less $, though.  It arrived today.  I'll see if I can get it populated and fired up tomorrow 8)
Title: Re: Help ID this cap...
Post by: slimtriggers on November 22, 2011, 07:38:03 PM
Well, it didn't work >:(  I get no voltage past D1, which makes me think it might be backwards on the layout ???

Maybe I goofed something up, but right now I can't recommend it. 
Title: Re: Help ID this cap...
Post by: nzCdog on November 22, 2011, 07:41:08 PM
 :(  Bummer! 
Ebay has a lot of comeback for the buyer tho... I'm sure if you can't get it to work the seller would make it right?
Title: Re: Help ID this cap...
Post by: gtr2 on November 22, 2011, 08:34:39 PM
All the kits I've seen are positive ground, including mine.  Are you powering it correctly?

Josh
Title: Re: Help ID this cap...
Post by: slimtriggers on November 22, 2011, 09:26:53 PM
Yeah, I'm an idiot.  It works perfectly with the correct power supply(http://fc00.deviantart.net/fs44/f/2009/111/0/4/embarrassed_by_paigehpleuvoir.gif)