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Search: Posts Made By: eccerr0r
Forum: General Computer & Tech Discussion 05-29-2020, 12:56 PM
Replies: 48
Views: 1,969
Posted By eccerr0r
Re: A Colossal HDD Failure

interesting...thought for the most part hard drives shouldn't kill themselves by doing that...
Forum: General Electronics Technical Discussion 05-29-2020, 09:30 AM
Replies: 3
Views: 79
Posted By eccerr0r
Re: Too much current from a Buck Converter

inductor gets hot
mosfet gets hot
regulation/ripple/voltage no longer in spec, ICs no longer work properly.

Ideally it was designed with some buffer space past 20A but no guarantees.

I'm...
Forum: General Computer & Tech Discussion 05-29-2020, 12:09 AM
Replies: 48
Views: 1,969
Posted By eccerr0r
Re: A Colossal HDD Failure

but he could just --repair-sector and it's no longer bad because it wasn't really bad to begin with?
Forum: General Computer & Tech Discussion 05-28-2020, 02:11 PM
Replies: 48
Views: 1,969
Posted By eccerr0r
Re: A Colossal HDD Failure

Do tell how you created exactly one bad sector, this will be interesting :D

Or is there the possibility of more damage than just that one sector?
Forum: Troubleshooting Power Supplies and Power Supply Design 05-27-2020, 03:13 PM
Replies: 12
Views: 188
Posted By eccerr0r
Re: Dead ATX power supply, please help.

nice, inductor fried itself to protect the fuse, that's a new one. Usually transistors do that.

Then again, likely there are fried transistors here after all is done and through...
Forum: General Electronics Technical Discussion 05-27-2020, 12:22 PM
Replies: 10
Views: 161
Posted By eccerr0r
Re: Repairing a heater wire in a toaster.

Yes it needs to be crimped together with a proper crimp connector and needs to be done properly. Twisting the wires together will not do, and obviously not soldering. Ideally it needs to be welded...
Forum: General Electronics Technical Discussion 05-26-2020, 06:34 AM
Replies: 20
Views: 252
Posted By eccerr0r
Re: Decorative Solar Lamp Question

I'm not sure how people came up with heat guns to deal with unsealing plastic, thermoset plastics (like epoxy) don't work that way. Even if it does release, it may become opaque and also made...
Forum: General Electronics Technical Discussion 05-25-2020, 08:25 PM
Replies: 20
Views: 252
Posted By eccerr0r
Re: Decorative Solar Lamp Question

I have a solar panel (probably 4W) likewise having issues, it appears to simply be oxidation loss from either water or simply air leaks, pretty much total loss I think as they are glued sealed and...
Forum: General Electronics Technical Discussion 05-25-2020, 08:50 AM
Replies: 10
Views: 161
Posted By eccerr0r
Re: Repairing a heater wire in a toaster.

If you insist on repairing, you have to crimp. You're probably better off using the same gauge heater element but if all else fails, just jumperring with a short piece of copper wire will do. No...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-24-2020, 08:23 AM
Replies: 4
Views: 154
Posted By eccerr0r
Re: Samlex SEC-14 linear power supply 13.8VDC 10A repair

Yes it does have short circuit protection, you drew it. The "UVLO logic" indeed is short circuit protection. You probably can easily use that circuitry or even repurpose the components there to...
Forum: General Electronics Technical Discussion 05-23-2020, 07:59 PM
Replies: 20
Views: 252
Posted By eccerr0r
Re: Decorative Solar Lamp Question

if any of it is in shade, it could drop down to 0.5V, so that could be one thing...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-22-2020, 11:05 PM
Replies: 4
Views: 154
Posted By eccerr0r
Re: Samlex SEC-14 linear power supply 13.8VDC 10A repair

IMHO:
The DNP capacitor should take the other 4.7mF capacitor on the control 22VDC rail, and that now depopulated 4.7mF capacitor can safely go down to 2.2mF. Perhaps this would be slightly cheaper...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-21-2020, 07:00 PM
Replies: 4
Views: 154
Posted By eccerr0r
Re: Samlex SEC-14 linear power supply 13.8VDC 10A repair

At least it has short circuit protection...

Also it should have fairly decent regulation (instead of just having a simple emitter follower regulator. No op amps or LM723 but it does appear to...
Forum: Other Devices with Bad Capacitors 05-20-2020, 10:40 AM
Replies: 3
Views: 167
Posted By eccerr0r
Re: RIFA Class Y Capacitor remedy

These are all noise suppressing capacitors and it may introduce interference to radio/tv devices which may cause unwanted behavior.

The theory is that as a Y-class capacitor it should not fail...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-20-2020, 07:38 AM
Replies: 7
Views: 217
Posted By eccerr0r
Re: Silent APC UPS?

and I thought I was being over sensitive when I can't stand Delta fans...

/me goes back to listening to the computer fan cacophony. Sans Delta fans however.
Forum: General Electronics Technical Discussion 05-20-2020, 07:33 AM
Replies: 51
Views: 976
Posted By eccerr0r
Re: Electric oven tripping circuit breaker after turned on for 3-5 minutes

Thinking about it again, is it really a RCD trip or is it excessive current shorting when hot? The latter is not really likely but still plausible if a large amount of current if the outside shield...
Forum: General Electronics Technical Discussion 05-19-2020, 06:13 PM
Replies: 51
Views: 976
Posted By eccerr0r
Re: Electric oven tripping circuit breaker after turned on for 3-5 minutes

Someone needs to change this thread's index topic from "Circuit Breaker" to "RCD" or "GFCI" or RCCB even ... Ugh... this has been bothering me...

sorry, pet peeve...
Forum: General Computer & Tech Discussion 05-18-2020, 09:36 AM
Replies: 4
Views: 127
Posted By eccerr0r
Re: IBM PC compatible: Who still uses this term?

it's not a big deal anymore because M$ strongarms any potential machine that could run windows. If it could run windows they force that computer maker to sell a copy of windows with it and ensure...
Forum: General Electronics Technical Discussion 05-14-2020, 02:47 PM
Replies: 23
Views: 361
Posted By eccerr0r
Re: Mosfet Power dissipation question

The threshold voltage of the MOSFETs turning on is usually typical and actually is a range hence it's specified as such on the spec sheet. So you typically do have to tweak bias voltages when you...
Forum: General Electronics Technical Discussion 05-14-2020, 01:49 AM
Replies: 14
Views: 332
Posted By eccerr0r
Re: SB315 and SB320 Shottky Diodes Voltages - TV PSU

I wouldn't say SB315=SB3150, but rather SB315 0C40 = SB3150 ...

The board analysis probably would have told me to get at least 60V units but well, if it was all potted it'd be hard to tell...
Forum: General Electronics Technical Discussion 05-13-2020, 04:36 PM
Replies: 23
Views: 361
Posted By eccerr0r
Re: Mosfet Power dissipation question

It appears the NF was supposed to be an "upgrade" to the NE, but these were meant to be run in switch mode. Running them in forward-active analog mode the improved parameters don't matter as much.
...
Forum: General Computer & Tech Discussion 05-11-2020, 08:39 AM
Replies: 59
Views: 1,634
Posted By eccerr0r
Re: New SSD hard drive in laptop computer what a difference in boot time

Well actually for cell phones, cheap is good. I see lots of people toting around phones with cracked screens - this is not fault of the design... but sh*t happens and easier to replace...

I got...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-09-2020, 04:09 PM
Replies: 11
Views: 3,365
Posted By eccerr0r
Re: Fun with a new 100W power supply...

Well, got more "power supplies" to play with. Hoping to play with voltage instead of current...

except now found a new concern: voltage too high for the power supply itself :(

Looks like I...
Forum: General Electronics Technical Discussion 05-09-2020, 04:02 PM
Replies: 14
Views: 332
Posted By eccerr0r
Re: SB315 and SB320 Shottky Diodes Voltages - TV PSU

I suspect that the real part number is "SB3150 C40" :D
In any case yes, 15 V part for 13V is way too low. 20V part is still too low.

I'd think that Schottky diodes are extremely sensitive to...
Forum: General Electronics Technical Discussion 05-09-2020, 03:56 PM
Replies: 51
Views: 976
Posted By eccerr0r
Re: Electric oven tripping circuit breaker after turned on for 3-5 minutes

how about this, all the attachment points of the heater element and the oven, put in a mica or something insulator there that isolates the shell from ground. Then connect one end of the power to the...
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