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post #21 of 44
Quote:
Originally Posted by jy360 View Post
So a capacitor I'm my psu blew today and I won't be able to get a new psu until at least Tuesday but I honestly can't wait that long without my pc lol. The capacitor that blew was rated at 680 micro farads and 200 volts, the problem is I only have 2 330 micro farads capacitors, can I connect them in series to double the capacitance and will the 20 micro farad short fall be a problem?
Like said above, 20uF won't make much of a difference. Do you have an oscilloscope by any chance? Plugging that to your 12V line to test the PSU would be your best bet. If you don't, a multimeter should work, make sure it's within 5% of 12V.
post #22 of 44
Thread Starter 
Quote:
Originally Posted by nolonger View Post
Like said above, 20uF won't make much of a difference. Do you have an oscilloscope by any chance? Plugging that to your 12V line to test the PSU would be your best bet. If you don't, a multimeter should work, make sure it's within 5% of 12V.
Yeah I have this big mega tester thing and it does pretty much everything. Thanks BTW
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post #23 of 44
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Well ermm.... it worked! But there's another problem one of the releys buzz for about half a second and then nothing
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post #24 of 44
Last liitle warning, electrolytic capacitors are polarity dependant and they will "explode" (OK just a loud "bang") if you get the polarity wrong. We had one guy in class get this wrong with a physicaly small capacitor (I can't remember its value), sounded like a .22 going off.
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post #25 of 44
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Quote:
Originally Posted by PCCstudent View Post
Last liitle warning, electrolytic capacitors are polarity dependant and they will "explode" (OK just a loud "bang") if you get the polarity wrong. We had one guy in class get this wrong with a physicaly small capacitor (I can't remember its value), sounded like a .22 going off.
Yeah I know
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post #26 of 44
Quote:
Originally Posted by PCCstudent View Post
Last liitle warning, electrolytic capacitors are polarity dependant and they will "explode" (OK just a loud "bang") if you get the polarity wrong. We had one guy in class get this wrong with a physicaly small capacitor (I can't remember its value), sounded like a .22 going off.
We do that on purpose in class.
post #27 of 44
Thread Starter 
Quote:
Originally Posted by nolonger View Post
We do that on purpose in class.
Nah what more fun is lining up 2 led's and attaching them to the 15v AC. it like a game because you run the risk of being hit by the hot shards of plastic
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post #28 of 44
Quote:
Originally Posted by jy360 View Post
Nah what more fun is lining up 2 led's and attaching them to the 15v AC. it like a game because you run the risk of being hit by the hot shards of plastic
Nah, that would be too obvious to the teacher. Inverting cap polarity happens and we won't get called on for that. Plus we usually work with DC power supplies that use 1-30V.
post #29 of 44
Thread Starter 
Quote:
Originally Posted by nolonger View Post
Nah, that would be too obvious to the teacher. Inverting cap polarity happens and we won't get called on for that. Plus we usually work with DC power supplies that use 1-30V.
The teacher spends half the time out of the class so we just experiment with the power although the overwhelming smell of burning electronics do give it away.
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post #30 of 44
Quote:
Originally Posted by jy360 View Post
The teacher spends half the time out of the class so we just experiment with the power although the overwhelming smell of burning electronics do give it away.
Hehe yea. It's especially bad with resistors.
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