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Search: Posts Made By: stj
Forum: Power Supply Design and Troubleshooting Today, 02:17 AM
Replies: 54
Views: 1,454
Posted By stj
Re: Please help me understand\fix this discrete linear power supply

maybe the internal difference between different makes of regulator matters.

i'v seen similar issues with old (fast) 74'series digital logic that you had to use TI chips because other makes couldnt...
Forum: Power Supply Design and Troubleshooting Today, 12:47 AM
Replies: 54
Views: 1,454
Posted By stj
Re: Please help me understand\fix this discrete linear power supply

yes, but it also stops the regulation getting messed up if there is a voltage on the output from another source when the regulator starts up.

i have seen a lot of circuits using +/- 78 & 79...
Forum: Troubleshooting Computer Displays Yesterday, 10:54 PM
Replies: 18
Views: 250
Posted By stj
Forum: Power Supply Design and Troubleshooting Yesterday, 10:51 PM
Replies: 54
Views: 1,454
Posted By stj
Re: Please help me understand\fix this discrete linear power supply

that -v on the regulator output rings a bell.

i think you need a bypass diode.
example on page4
Forum: General Computer Discussion Yesterday, 10:46 PM
Replies: 119
Views: 1,807
Posted By stj
Re: more win10 stuff

one of the fucked ms drivers being pushed is for an integrated realtek audio chip used on a lot of newer motherboards!
Forum: Troubleshooting TVs and Video Sources Yesterday, 07:44 PM
Replies: 7
Views: 51
Posted By stj
Re: Panasonic TH-37PX80EA thunder lightning

direct hit, or nearby hit?

and get a schematic for the psu - your probably going to need it.
Forum: General Electronics Technical Discussion Yesterday, 07:42 PM
Replies: 16
Views: 201
Posted By stj
Re: H-E-L-P! How do I learn to use my new oscilloscope?

maybe a 1:1 transformer inline with the probe, but a beginer should never try to make something like that.
Forum: General Computer Discussion Yesterday, 07:39 PM
Replies: 119
Views: 1,807
Posted By stj
Re: more win10 stuff

yes, not in direct monetery form, but they do pay a heavy price for it! :whistle:
Forum: General Electronics Technical Discussion Yesterday, 05:26 PM
Replies: 1
Views: 40
Posted By stj
Re: Electrical isolation of PCB, need advice

i use epoxy resin,

you could use silicone if it's not acid or alkaline based cure.
read the packets.
Forum: General Computer Discussion Yesterday, 05:24 PM
Replies: 119
Views: 1,807
Posted By stj
Re: more win10 stuff

lol
so they implement the "user choices" in win12?
Forum: General Electronics Technical Discussion Yesterday, 05:23 PM
Replies: 16
Views: 201
Posted By stj
Re: H-E-L-P! How do I learn to use my new oscilloscope?

dont scope mains power.
infact check the voltage rating on your probes - some are only 300v rated.
Forum: General Computer Discussion Yesterday, 03:43 PM
Replies: 119
Views: 1,807
Posted By stj
Re: more win10 stuff

according to the comments, there is a disable option - and it's ignored!!!

so it makes me wonder how many other options are ignored - like the privacy opt-outs!!!
Forum: General Electronics Technical Discussion Yesterday, 03:41 PM
Replies: 2
Views: 49
Posted By stj
Re: FT labs detectors

radiation hits the sensor creating a pulse, the sotfware counts the pulses per second - that's all.
it's probably junk in something that small.

btw, there was a guy who used the cmos camera as a...
Forum: General Capacitor Questions & Issues Yesterday, 04:03 AM
Replies: 6
Views: 107
Posted By stj
Re: Help to Identify

15 delivery charge on u.s. stock.

he needs to use a 6.3v version from wurth-technik
or see if RS has other brands in stock.

both RS and Farnell are busy cutting each others throats at the...
Forum: General Computer Discussion Yesterday, 03:38 AM
Replies: 119
Views: 1,807
Posted By stj
Re: more win10 stuff

http://www.extremetech.com/extreme/211515-windows-10-attempts-to-install-drivers-for-hardware-you-no-longer-have

you may want to skip the article and just read the comments.
it looks like the fun...
Forum: Troubleshooting Computer Displays Yesterday, 03:15 AM
Replies: 93
Views: 8,758
Posted By stj
Re: Dell 2709w No power

2sk3679? get a datasheet and find an equiv part.
Forum: Major Manufacturers Boards 08-03-2015, 09:04 PM
Replies: 28
Views: 665
Posted By stj
Re: Cant get capacitor legs out!!!

brass wool does a good job.
Forum: Major Manufacturers Boards 08-03-2015, 04:20 PM
Replies: 28
Views: 665
Posted By stj
Re: Cant get capacitor legs out!!!

modern tips will be destroyed like that, they are iron-coated copper.
if you sand the iron off, the flux in the solder will eat the copper away pretty fast!
Forum: General Computer Discussion 08-03-2015, 04:17 PM
Replies: 119
Views: 1,807
Posted By stj
Re: more win10 stuff

the o.s. should be a background task that exists to help you run your programs,
people talk about windows as though it's the main event!

i could understand if people talked about office (MS or...
Forum: General Capacitor Questions & Issues 08-03-2015, 04:08 PM
Replies: 6
Views: 107
Posted By stj
Re: Help to Identify

820uf 2.5v polymer
you know the diameter - i dont.
once you know the diameter, farnell has some with free shipping.
Forum: General Electronics Technical Discussion 08-03-2015, 12:14 PM
Replies: 1
Views: 74
Posted By stj
Forum: General Computer Discussion 08-03-2015, 05:41 AM
Replies: 31
Views: 503
Posted By stj
Re: Random Lockup Blues

more likely they replaced the board and the new one didnt have it.
Forum: General Capacitor Questions & Issues 08-03-2015, 02:47 AM
Replies: 6
Views: 107
Posted By stj
Re: Help to Identify

see this post. :)
http://www.badcaps.net/forum/showpost.php?p=578748&postcount=8
Forum: General Computer Discussion 08-03-2015, 02:42 AM
Replies: 119
Views: 1,807
Posted By stj
Re: more win10 stuff

they make 5400rpm sata drives too.
Forum: General Computer Discussion 08-03-2015, 12:53 AM
Replies: 119
Views: 1,807
Posted By stj
Re: more win10 stuff

these are all free - it depends on your income model.
http://distrowatch.com/
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