DC to DC converter

#12

Joined Nov 30, 2010
18,224
Use a transformer + rectifier + regulator?
Buy a wall-wart?

We need you to describe the required current.
 

#12

Joined Nov 30, 2010
18,224
Oops. I assumed that was a typo. Will be interested in discovering where a person finds 240 VDC. Depends quite a lot on how much current is involved. Might be inside an electronic device like a TV.
 

SgtWookie

Joined Jul 17, 2007
22,230
It's going to take a lot more than a 555 timer, MOSFET and transformer.

If you're planning on building it yourself, it's going to be a pretty involved project, and involve working with hazardous voltage potentials. You will need an oscilloscope for troubleshooting. If you are new to electronics, this is not a project you should attempt.

It would be easiest to look for an off-the-shelf solution; however you didn't mention what your current requirements at 12v are.
 

t06afre

Joined May 11, 2009
5,934
What you want to do. Is done in primary switched power supply. You will find a lot of ICs that can do this job. These kind of power supplies also require some transformers that may be more difficult to get. I am somewhat puzzled by your request. 240 volt DC. Is quite rare. That kind of DC voltage may be used in say electrical cars. And hence a warning. The site do not allow any automotive topics.
 
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