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Search: Posts Made By: momaka
Forum: General Electronics Technical Discussion 10-28-2021, 05:33 PM
Replies: 18
Views: 577
Posted By momaka
Re: Master power switch for E-bike ideas

Might be OK... though I do suggest as well to use an actual physical switch/solenoid/contactor, as stj suggested... because if the motor controller shorts a MOSFET, you may not have a fun time on...
Forum: General Electronics Technical Discussion 10-21-2021, 12:21 PM
Replies: 7
Views: 360
Posted By momaka
Re: AC / DC ADAPTER upgrade?

Maybe, maybe not.
As eccerr0r pointed out above, you can tweak the voltage a little bit, but don't expect to go too far beyond what it was designed for.

Depending on the topology of the adapter,...
Forum: General Computer & Tech Discussion 10-20-2021, 06:09 PM
Replies: 3
Views: 251
Posted By momaka
Re: Win 10, Multi-Monitor Wallpaper Help

Hmmm... well this may be more of a workaround... but how about split the ultra-wide image into two and set each half to its proper side?
I know - extra work when you want to change backgrounds......
Forum: General Capacitor Questions & Issues 10-20-2021, 12:42 PM
Replies: 6
Views: 498
Posted By momaka
Re: Bad Caps in the Movies !!!!!!

It definitely looks Pentium II / Pentium 3 era with that golden-green PCB and "CET" TO-262 MOSFETs.

It probably is just a prop - most likely they got a bunch of old hardware from a recycling...
Forum: General Capacitor Questions & Issues 10-20-2021, 12:38 PM
Replies: 8
Views: 445
Posted By momaka
Re: Do bad capacitors stink?

Yes, bad (leaked / vented) electrolytic capacitors can (and usually do) stink... and at least not in any good way I can think of. It's not like "burned/toasty electronics" type of smell, though. More...
Forum: General Electronics Technical Discussion 10-19-2021, 11:45 PM
Replies: 4
Views: 265
Posted By momaka
Re: Solder station question

Short answer: I think the two stations use incompatible tips, no matter how you try to rewire them.

Although I'm not familiar with that Tenma nor the Yaxun, it sounds like the Yaxun is using the...
Forum: General Electronics Technical Discussion 10-19-2021, 11:31 PM
Replies: 7
Views: 360
Posted By momaka
Re: AC / DC ADAPTER upgrade?

More that likely, that would -not- be possible.

Some of these adapters (at least laptop ones) do have current limiting protection (OCP) on the output. They can do a slightly higher "burst" current...
Forum: General Electronics Technical Discussion 10-19-2021, 10:52 PM
Replies: 6
Views: 417
Posted By momaka
Re: Theory on Negative Voltages Please...

That should work fine. :)
Indeed just make sure ground is disconnected on the "lower" PSU in that diagram.
Looks like you're getting there in terms of understanding negative voltages with that...
Forum: General Computer & Tech Discussion 10-19-2021, 08:05 PM
Replies: 36
Views: 2,903
Posted By momaka
Re: <play taps>RadeonHD 5770 dead at ... ~10?

Yeah, like I mentioned, the stock heatsinks are just crap, so sometimes even a better fan cannot help them.

Still, considering your card did 10 years with its stock cooler - that's pretty decent...
Forum: Troubleshooting Power Supplies and Power Supply Design 10-19-2021, 07:13 PM
Replies: 16
Views: 5,490
Posted By momaka
Re: Repairing Bestec TFX0250D5W

Yes, sounds like it was damaged already from before. Of course, before putting in new TNY276 chip, check its surrounding components for faults. Otherwise, this could repeat.

Also, to actually test...
Forum: Troubleshooting Audio Equipment 10-17-2021, 01:09 PM
Replies: 16
Views: 760
Posted By momaka
Re: Think I would need to recap this Sunfire bi-wired amp ?

If your amp blew on the dim bulb, it might have already had issues to begin with.
Yes, transistors can still get killed even with the series incandescent bulb, particularly if the amp has large bulk...
Forum: Troubleshooting Power Supplies and Power Supply Design 10-17-2021, 12:22 PM
Replies: 16
Views: 5,490
Posted By momaka
Re: Repairing Bestec TFX0250D5W

^ Doesn't look to bad. Just need to clean the board well from all the soot where these two burned. IPA should work OK for that.

Output electrolytic caps could probably also use replacing with (if...
Forum: General Computer & Tech Discussion 10-16-2021, 08:33 PM
Replies: 36
Views: 2,903
Posted By momaka
Re: <play taps>RadeonHD 5770 dead at ... ~10?

^ Well, OK, you know what I meant. :D Let's call it integrated then (be it APU, IGP, onboard) for the sake of distinguishing it from discrete GPUs.

By the way, here's a listing I found for a...
Forum: Troubleshooting Power Supplies and Power Supply Design 10-16-2021, 08:24 PM
Replies: 16
Views: 5,490
Posted By momaka
Re: Repairing Bestec TFX0250D5W

You can check Digikey.com or Mouser.com for parts, if you haven't already. That way, you can get everything in one order (and shipping.) There are other parts places online too, but these are the...
Forum: Troubleshooting Power Supplies and Power Supply Design 10-16-2021, 07:18 PM
Replies: 16
Views: 5,490
Posted By momaka
Re: Repairing Bestec TFX0250D5W

No worries about not being able to attach pictures (though if the forum is rejecting them, it may be because they are too big in terms of size or resolution - must be scaled to 3000x3000 max. or...
Forum: General Computer & Tech Discussion 10-16-2021, 06:12 PM
Replies: 36
Views: 2,903
Posted By momaka
Re: <play taps>RadeonHD 5770 dead at ... ~10?

Probably 50/50 bad luck and just not cooling your GPUs enough (relying on the stock HS or stock fan profile.)

By the way, I was just looking through the ghetto mod thread and saw this post of...
Forum: General Computer & Tech Discussion 10-16-2021, 05:32 PM
Replies: 581
Views: 198,023
Posted By momaka
Re: The ghetto mod thread

Nice! That can double as a ventilation hole too (or a secret pocket to hide something?) :D


Franken-top complete. I like the mismatching colored plastics too.
But hey, it works, that's all that...
Forum: Troubleshooting Audio Equipment 10-16-2021, 05:07 PM
Replies: 16
Views: 760
Posted By momaka
Re: Think I would need to recap this Sunfire bi-wired amp ?

Concur x2.

A standard 40W incandescent bulb on 120V AC will present at about 360 Ohms impedance to the input caps (at full short-circuit)... which should work quite nicely to reform them without...
Forum: General Computer & Tech Discussion 10-15-2021, 12:42 PM
Replies: 36
Views: 2,903
Posted By momaka
Re: <play taps>RadeonHD 5770 dead at ... ~10?

Yeah, in 3D stuff, 64-bit is... ugh.


^ But that's a GT 710 - it's a "display adapter" and not a real video card. :lol:

But yeah, I see your point, it's about the number of monitors you can...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 10-15-2021, 12:18 AM
Replies: 10
Views: 658
Posted By momaka
Re: Asus Dual-RX580-O8G

Those vertical-colored bars are highly likely a bad GPU chip (bad connections on GPU die going to one or more memory chips.) I don't suggest wasting too much time with it. Feel free to bake it a...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 10-15-2021, 12:03 AM
Replies: 4
Views: 359
Posted By momaka
Re: Attempt to repair AMD FirePro

100% YES.

Don't take this offensively, but this is like driving your car and letting your engine overheat. Then it broke and you ask, could it be because it overheated? What do you think? ;)

In...
Forum: General Computer & Tech Discussion 10-14-2021, 11:25 PM
Replies: 36
Views: 2,903
Posted By momaka
Re: <play taps>RadeonHD 5770 dead at ... ~10?

Yup, that's not bad at all, considering these aren't know to be very reliable.

I wonder, though, did you use it for any gaming or 3D work?
IME, these cards last as long only when not...
Forum: Troubleshooting Audio Equipment 10-14-2021, 10:55 PM
Replies: 15
Views: 2,188
Posted By momaka
Re: JBL S412PII Speakers Distorted Bass Repair and Updated Schematics

^ Agreed.

Given the wide range of issues seen from those posts, I too would say there has to be a bad solder joint somewhere. In fact, even when I serviced the two S412PII amps, I think I might...
Forum: General Computer & Tech Discussion 10-14-2021, 08:50 PM
Replies: 45
Views: 8,584
Posted By momaka
Re: Topcat's Other Misc Weird Build Thread

Oh yeah, I saw that in the cheap scores thread when I scrolled through it briefly last time.

Neat way to get rid of cases that aren't worthwhile.
Though I saw the front panel and/or USB/front...
Forum: General Electronics Technical Discussion 10-14-2021, 07:58 PM
Replies: 91
Views: 4,577
Posted By momaka
Re: Has anyone had issues with Rayovac Alkaline batteries leaking

And I called it out right!

Just as I was taking a shit today, one of the smoke detectors stated going off beeping once a minute to indicate it's got a low battery. Fortunately, I was just about...
Showing results 1 to 25 of 500

 
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