Power Regulator

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Wayne Richards

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hi i have a toroidal transformer  linked to a board  and it has a voltage of 67v dc  it has a smoothing cap of 63v 1000uf  if i replaced it with a 35v 1000uf  would that help bring the voltage down i am trying to bring the voltage down to 28 volts dc 

i do have pictures if needed 

 
hi i have a toroidal transformer  linked to a board  and it has a voltage of 67v dc  it has a smoothing cap of 63v 1000uf  if i replaced it with a 35v 1000uf  would that help bring the voltage down i am trying to bring the voltage down to 28 volts dc 

i do have pictures if needed 

 
connecting a cap rated to a lower voltage will release its smoke. it then wont work. youre going about lowering the voltage completely wrong, you need a voltage regulator or simialr for that

 
Threads merged, please don't ask the same question in more than one place as it just causes confusion! ;)

Welcome to the forum.

Your Avatar has been changed because it had a rude word in it.

This is a polite forum, swearing and rude words are not acceptable.

OK, next, replacing the cap in the way you descrive will only make the replacement cap release its smoke prematurely.

Smoke makes everything electrical work! ;)

Once the magic smoke escapes electrical things stop working.

Now, if you have a torroid outputting 67V dc, you have something else in place there.

A toroidal transformer cannot output d.c. on its own without some other circuitry.

It is not scientifically possible to transform d.c. current as d.c. current.

Now, if you explain what you have, and what you are trying to achieve then we can probably help you.

There are options for you.

The cap that you have replaced is almost certainly a smoothing cap on the d.c. output of the power supply, after the rectifier, so the first thing you need to do is to swap that back.

 
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