If 5.0v then use an LM317 regulator. You can easily use this to do what you want with just a couple of resistors and capacitors.
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Here is one example that is exactly what you need, and shows the formula for calculating resistor values for any output voltage that you want. within limits of the device and supply voltage of course.
If it is 0.5v DC, you have a big problem. You will need a switchmode converter.
**Nonsense. It is quite easy to build a power supply that can be varied down to zero Volts. It is not quite as simple as using a single chip regulator however.
**It's difficult to understand the original poster's requirements, as he/she appears to be severely illiterate. You could be correct. Subsequent posts from the OP have done nothing to clarify. I would encourage the OP to find someone whose first language is English and ask them to translate the request from their native language.
**It's difficult to understand the original poster's requirements, as he/she appears to be severely illiterate. You could be correct. Subsequent posts from the OP have done nothing to clarify. I would encourage the OP to find someone whose first language is English and ask them to translate the request from their native language.
Trevor gave you the correct answer and a link in comment #3 So why get agro ?
No one (not even you NO-ONE).. Said .5v AND 3V.. If you had (or inferred) ....AND.... you would, presumably, get answers that provide a .5V output AND a 3V output...
.5v TO 3V can mean .5V in to 3V out. As in 240VAC to 12VDC
it can also mean
Variable between .5v and 3V. (with inference on The output voltage)
I find it hard to believe that you cannot bring yourself to see that glaring amiguity, but instead jump down peoples throats for asking for more information on your problem.
You seriously are not going about things the right way if you are in need of answers ... People (except those wanting to inflame) would just ignore you.
No... its more obvious there due to the huge step up range and the fact that `power supply' is mentoned AFTER the range ..... but the ambiguity still (technically) exists but because of the way it is said the automatic inferrence is a variable output...
The bottom line is If you want answers .. be nice... if you want to play games go about things the way you are..
Hey Mick We can only hope the onrush of teenage hormones will abate a bit in a few years and then perhaps with some life experience under it's belt there may be some improvement in manners and knowledge.
**Sadly, I fear the written communication skills of young people may never amount to anything worth a damn. As can be seen from this thread, this is a potentially extremely serious situation.
Actually no a lot of the time written skills bears little relevance to many positions apart from some box ticking on the computer Some the best sales people are near illiterate but can smooze terribly well
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