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Search: Posts Made By: eccerr0r
Forum: General Computer & Tech Discussion 08-11-2022, 11:21 AM
Replies: 3
Views: 120
Posted By eccerr0r
Re: Motherboard diagnostic LED states

I used to have an old P4 board (MSI branded ATX, desktop board) that had 4 diagnostic LEDs on the back panel that counted from 0 (all off) to 15 (all on) as it went through POST, each meaning...
Forum: General Electronics Technical Discussion 08-10-2022, 05:09 PM
Replies: 13
Views: 269
Posted By eccerr0r
Re: Converting +/- 5v to a Usable Hz Signal

Sounds like you need someone to do it for you, I think we've given all the clues we can give without having access to the actual hardware... This won't be a "buy this connect that" solution.
Forum: General Electronics Technical Discussion 08-10-2022, 07:45 AM
Replies: 13
Views: 269
Posted By eccerr0r
Re: Converting +/- 5v to a Usable Hz Signal

You can't fix designs you don't have information to fix... and since the main reason for having the fan on is to cool it, just cool it like a CPU fan be damned with the noise or whatever issue those...
Forum: General Electronics Technical Discussion 08-09-2022, 05:24 PM
Replies: 13
Views: 269
Posted By eccerr0r
Re: Converting +/- 5v to a Usable Hz Signal

I'd say don't bother, feed it 100% duty cycle and bang/bang the control with hysteresis if desired. That's how it's done in cheap cars that mere mortals drive...
Forum: General Computer & Tech Discussion 08-09-2022, 05:21 PM
Replies: 17
Views: 348
Posted By eccerr0r
Re: laptop vs desktop rust spinner longevity

If someone's using a laptop on their lap then I don't care how well you can keep your lap still, there will be movement. Not to also mention laptops tend to get hotter than desktop PCs (usually).
...
Forum: General Computer & Tech Discussion 08-09-2022, 12:26 PM
Replies: 17
Views: 348
Posted By eccerr0r
Re: laptop vs desktop rust spinner longevity

Do these drives (scorpio blue, rosewell, momentus) last longer if they weren't in laptop situations?

None of my laptop drives (excluding so far: SSDs but offtopic) last long, but they were all in...
Forum: General Computer & Tech Discussion 08-08-2022, 06:14 AM
Replies: 17
Views: 348
Posted By eccerr0r
Re: laptop vs desktop rust spinner longevity

hmm... so six one way, half dozen the other...?
Forum: General Computer & Tech Discussion 08-08-2022, 12:22 AM
Replies: 17
Views: 348
Posted By eccerr0r
Re: laptop vs desktop rust spinner longevity

Then I wonder about the 5400rpm IDE/SATA laptop disks...will they work well. Seek would be significantly slower...
Forum: General Computer & Tech Discussion 08-07-2022, 08:28 AM
Replies: 17
Views: 348
Posted By eccerr0r
Re: laptop vs desktop rust spinner longevity

anyone used a lot of 2.5" drives in their desktop/server machines?

Wonder because I'd think 2.5" drives need to be made at higher tolerances but yes, due to size, the drives are lighter and thus...
Forum: General Capacitor Questions & Issues 08-06-2022, 08:36 AM
Replies: 29
Views: 756
Posted By eccerr0r
Re: Blown cap on old dwell gauge - kal equip 2851

cars don't use tachometers anymore?

hmm... electric cars wouldn't have tachometers I suppose but any gasoline ones it's still somewhat interesting information. Might not be useful information for...
Forum: General Computer & Tech Discussion 08-05-2022, 09:39 PM
Replies: 17
Views: 348
Posted By eccerr0r
laptop vs desktop rust spinner longevity

Has there been a study on how durable laptop 2.5" vs desktop 3.5" hard drives? Also consider 2.5" SAS drives which were meant for server use...

The thing that I wonder about is whether or not...
Forum: General Computer & Tech Discussion 08-01-2022, 07:07 PM
Replies: 200
Views: 294,135
Posted By eccerr0r
Re: Cleaning Motherboards - ATTN SMOKERS!!

Sometimes I wonder, which is worse - dried on HFCS soda versus sucrose soda. I think the latter might just chip off but water washes dried up HFCS soda pretty quickly...
Forum: General Electronics Technical Discussion 08-01-2022, 04:37 PM
Replies: 4
Views: 82
Posted By eccerr0r
Re: Battery Charger - Transformer advice

Yeah the lacquer is a good idea, or you can just ignore it the buzz, it's not unexpected. My car battery chargers buzz, and I just use the noise as an indication it's on, as there's no other power...
Forum: General Capacitor Questions & Issues 07-29-2022, 09:58 PM
Replies: 13
Views: 257
Posted By eccerr0r
Re: Any good references for variable capacitor design?

Or you can just move them closer/farther apart :D (which unfortunately is very nonlinear and capacitance drops very fast as you move farther apart, making frequency even harder to tune.)

The...
Forum: General Capacitor Questions & Issues 07-28-2022, 12:10 PM
Replies: 13
Views: 257
Posted By eccerr0r
Re: Any good references for variable capacitor design?

are we talking actual capacitor design, or tuner/antenna design, makes a difference here...
if you don't have any variable capacitors I'd think you're looking at the former. If you already have a...
Forum: General Capacitor Questions & Issues 07-26-2022, 06:37 PM
Replies: 10
Views: 306
Posted By eccerr0r
Re: solid polymer electrolytic capacitor go boom?

looks like reverse polarity has been well tested, and looks like high ripple current are even tolerated...

wonder about overvoltage and high ambient heat now?
Forum: General Capacitor Questions & Issues 07-25-2022, 08:34 AM
Replies: 10
Views: 306
Posted By eccerr0r
Re: solid polymer electrolytic capacitor go boom?

hmm...also curious what happens if they get overheated or overvoltaged. Unlike a "wet" capacitor, they don't have a liquid to boil off so I can't extrapolate a regular aluminum wet capacitor over. ...
Forum: General Capacitor Questions & Issues 07-25-2022, 07:12 AM
Replies: 10
Views: 306
Posted By eccerr0r
solid polymer electrolytic capacitor go boom?

Anyone had a solid polymer capacitor fail for whatever reason?

How do they fail? Do they explode, go open, short out, ?

How about for different reasons: forcing excessive ripple current,...
Forum: General Capacitor Questions & Issues 07-24-2022, 07:16 PM
Replies: 13
Views: 257
Posted By eccerr0r
Re: Any good references for variable capacitor design?

indeed the main problem is the plates need to be quite rigid and any slop that bends the plates will change the capacitance and cause your frequency to go off.

I think for the most part crystal...
Forum: General Capacitor Questions & Issues 07-24-2022, 08:34 AM
Replies: 13
Views: 257
Posted By eccerr0r
Re: Any good references for variable capacitor design?

capacitance has always been number of "active plate surfaces" times dielectric constant of air times area divided by distance between plates. Not much to it to make an air capacitor. Note that the...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-20-2022, 06:59 PM
Replies: 10
Views: 321
Posted By eccerr0r
Re: GNB 2100LP industrial battery charger

Where are the phantom SCRs?
Forum: General Electronics Technical Discussion 07-14-2022, 06:00 PM
Replies: 16
Views: 686
Posted By eccerr0r
Re: resistors in parallel ?

in this case power and energy don't really matter, just take a fixed amount of time and the math works out.

This confusion is because some people equate amps (or amp hours) with, or as a proxy for...
Forum: General Electronics Technical Discussion 07-13-2022, 07:53 AM
Replies: 16
Views: 686
Posted By eccerr0r
Re: resistors in parallel ?

I think the main reason to answer the way sam did is he was thinking about batteries and considering amps and not watts.

two 12V 1Ah batteries in series will give you 24V but still only 1Ah.
...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-05-2022, 08:11 PM
Replies: 3
Views: 250
Posted By eccerr0r
Re: Fastest way to ATX cuttoff

There's no way for a PSU to tell a difference from a semi-short and a very high load. Only way perhaps is to have a fast acting thermal camera that will shut down immediately if a hotspot is...
Forum: General Capacitor Questions & Issues 07-01-2022, 08:16 AM
Replies: 9
Views: 369
Posted By eccerr0r
Re: 3300F 450V caps...

how many F is needed to not cause damage and make a difference :D ?

I think a 3.3mF could cause significant damage... granted you have to get unlucky in one direction, most of the cap is...
Showing results 1 to 25 of 500

 
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