stj
Great Sage 齊天大聖
Last Activity: Yesterday, 01:36 PM
Joined: 12-23-2009
Location: Europe
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the cooler should screw into a metal or re-inforced plastic frame on the underside - there should never be bending... -
are there any really small electrolytics other than maybe near the audo output?...Leave a comment:
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ceramic capacitors can go short circuit a lot - see if the transistor has a parallel ceramic cap...Leave a comment:
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33063 is a buck convertor - it needs an inductor and a fast diode followed by a low esr cap.
check the example and then check your board.
[url]https://www.ti.com/lit/ds/symlink/mc33063a.pdf[/url]https://33063 is a buck convertor - ...063a.pdf[/url]Leave a comment:
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you can coat the insides with nicotine all you want,
the only thing really effected is optical drives - i doubt a gaming rig even has a place for one!...Leave a comment:
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check the caps.
or monitor the network for packet errors.
if the caps start to fail the electrical noise will start corrupting packets and they will need to be re-sent...Leave a comment:
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LOL - that water pipe!
i went to a flat once that could zap you from the taps!!!
inductive coupling because the water company had replaced the old pipe with a poly one!!
i had to go into the basement and reconfigure the earthing from the water line to the incomming power shielding.
got some great sparks when i connected it!...Leave a comment:
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how do rats chew the cables? isnt it concentric?...Leave a comment:
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why the hell does it have a mosfet that shorts the bridge rectifier output?...Leave a comment:
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look here - there is a whole series of tests & teardowns
[url]https://www.youtube.com/channel/UCQak2_fXZ_9yXI5vB_Kd54g/videos[/url]https://look here - there is a whole...g/videos[/url]Leave a comment:
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it really depends on if the psu has a doubler i suspect.
but i would say 380v is a safe limit unless you want to remove the MOV's!!
it probably wont work with active PFC though.
lower limit is more interesting, people have powered stuff like Rygol/Siglent scopes with stuff like 60v battery packs!
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the time thing is interesting.
maybe a cracked element in a water tank or even a kettle/coffee maker?...Leave a comment:
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first is the actual path for the IR clear or blocked with dust?
second, i suspect the sensor drives the base of the transistor that then drives the relay and the cap next to the transistor may be on the base to hold it on a while.
so if the beam-path is clean i would look at that transistor and capacitor...Leave a comment:
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i doubt ripple matters or they would have used a 4.7uf or higher
but in future for low value high voltage you should look at Rubicon LLE series...Leave a comment:
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whats the series on the chang?
[url]https://www.paullinebarger.net/DS/Chang/[/url]
[url]https://www.paullinebarger.net/DS/Chengx/[/url]https://whats the series on the chan.../Chengx/[/url]whats the series on the chang?
[url]https://www.paullinebarger.net/DS/Chang/[/url]
[url]https://www.paullinebarger.net/DS/Chengx/[/url]https://whats the series on the chan.../Chengx/[/url]Leave a comment:
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all caps have ripple handling - i dont know why they didnt list it...Leave a comment:
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FR is fine for anything other than the cpu - which is why it had polymers...
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how often is the tripping?...Leave a comment:
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did you test it off the board?
wipe it with IPA, i think it has a film of flux residue on it...Leave a comment:
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ECS boards are often used in industrial applications, they can build good stuff.
a lot of arcade equipment has ECS mobo's in them....Leave a comment:
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