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Power supply output voltage

Peter Bullock

Mar 9, 2015
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Mar 9, 2015
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9
Hello,

When I switch my power supply on it outputs 5V as required, but after a few seconds the voltage drops and it makes a clicking sound, is this normal or could it be so kind of fault ?

PB
 

dave9

Mar 5, 2017
1,188
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Mar 5, 2017
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Some PSU require a load, do you have it powering one?
 

davenn

Moderator
Sep 5, 2009
14,254
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Sep 5, 2009
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14,254
Hello,

When I switch my power supply on it outputs 5V as required, but after a few seconds the voltage drops and it makes a clicking sound, is this normal or could it be so kind of fault ?

PB


Some PSU require a load, do you have it powering one?


that's a possibility
But more likely there's a faulty in it, maybe dried out electrolytic capacitors and fail soon after power is applied

how about telling us more about the supply ... make model, show a photo, is it a plug-pack ??


Dave
 

BobK

Jan 5, 2010
7,682
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Jan 5, 2010
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7,682
What is it's rating? What is it powering? It sounds like you are trying to draw too much current from it.

Bob
 
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