Would anyone know a proper capacitor discharge tool for motherboards made from resistors? I've searched Google but there's alot of them. I'd just like to know a PROPER ohm/resistor for the tool.
Thanks!
Thanks!
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Re: DIY Capacitor Discharge Tool
shorting them with a screwdriver never fails.......but honestly, I've never seen a motherboard cap hold a charge enough to actually require being discharged...nor is there enough voltage present for it to ever be a safety issue...<--- Badcaps.net Founder
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Re: DIY Capacitor Discharge Tool
Agree.
Don't need one for mobos.
The caps all have discharge paths.
Even if they didn't 12v won't do much more than get your attention.
(Inside the power supplies is a different story..)
.
If you just HAVE to have one anyway here's a way to make one.
.Last edited by PCBONEZ; 02-19-2012, 09:56 PM.Mann-Made Global Warming.
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Re: DIY Capacitor Discharge Tool
How do you solder backwards and get the solder back to being wire?
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Do you use ice to unshrink the tubing?
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[I didn't notice that...]Last edited by PCBONEZ; 02-20-2012, 03:17 AM.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Re: DIY Capacitor Discharge Tool
@all
Thanks for the replies!Comment
who came up with those directions.-
I'm making a new capacitor discharge tool. Asking for suggestions for sizing the discharge resistor.
Mr. Carlson's Lab High Voltage Capacitor Discharge Tool 1 is using 4 of 1kΩ 50W aluminum (mount to heatsink) resistors in series for 4kΩ 200W, so it's big, which is fine.
His Patreon but I don't have a paid subscription for the project details but it looks straightforward. The plastic box with aluminum plate can't get rid of any amount of that heat though.
Wirewound resistors can be overloaded by a factor of 5 for 5sec. and a factor of 10 for brief times. I've never tried say... -
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Hi people, I hope this is the correct spot to post this, I'm new to the forum.
I have an RTX 3080 Founders Edition which has a burnt up capacitor (it was in parallel with another capacitor which appears damaged too), so I am hoping to be able to identify the capacitor values and order replacements.
I hope these photos make it clear which component I am referring to:
(yes, the soldering is a bit botched from removing the blown one, I know)
I have found the board schematic (attached), but there does not seem to be a boardview available. I have never... -
Hi, I have 2 identical capacitors from an old scope I'm trying to get running.
Both caps measure ok in ESR and Capacitance values imo.
Data sheet says tolerance spec is -10 +50%. And these are way under that.
Both of there original values are marked as (430uf 200vdc).
After ~40 years, they now measure 485uf and 465uf. Well under the +50% tol.
Anyway I charged them up to 24 volts dc and discharged them slowly down to 10 volts using a Digital Multi Meter. Funny thing was one of them just took over 4 minutes to discharge down to 10 volts. And the... -
I replaced some capacitor which is located on optical pickup pcb which is shown in the table below(PCB #2).Because it have been out of order.
Now,It works very well,But I just have found that all caps (6svpc100my and other part number as well) ,which is shown in the table below, has ultra-high ripple current spec.
It is not able to obtain any capacitor which can be a substitute for this ultra-high ripple current nichicon capacitor.
So I replaced it with samxon and rubycon's general capacitor(GP,YXA series).
I know that these capacitor will not last as long as nichicon capacitor...
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