How to amplify voltage?

I have 5V DC, 0.5mA, how do I amplify this voltage to 20V DC or whatever voltage level I want?

Is this something that is easy or hard to do?

I should be easy enough to reduce voltage from 20V to 5V. Just put a resistor in the path of the current. But how to do the reverse? Step up the voltage....

I'm thinking coils like a transformer or something. Am I on the right path?

You are on the right track. Investigate what a transformer does and what causes it to do it. See if you can discover what happens on the input to get a certain output. You will probably see some new terms and be introduced to some new concepts on your quest; bring your questions back here.

BTW: When you use a resistor as you describe you didn't reduce the voltage, you just let some of it reside in a different place. Tom

google for "Switching Regulator".

I got this:

Andyb

-- The above email address is whitelisted. If I don't have your address already, I wont see your message.

Yes, and remember that you can't take out more than what you put in, is that the thumb rule? I means POWER_out

If you're talking about a supply voltage, a switching regulator would do it. They use an inductor (like a transformer but only one coil). It works by switching a current through the inductor to ground, which stores magnetic energy in the inductor, then cutting the current path to ground which forces it to flow into a higher voltage circuit and transfer the inductor's energy to a capacitor. (Inductors don't 'like' sudden changes in current the same way that capacitors don't 'like' changes in voltage, so if the path the current was flowing along is removed, it will look for a another route).

Power_out is ALWAYS equal to the power_in. The power out is just in a different form. In the case of electronics circuits, there is usually an increase in thermal energy for the drop in electrical energy. Mechanical motion and emitted photons are other forms that power converted from electrical energy can take.

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Like to see any example when the power_out = power_in.

I doubt about that, where all matter came from?

Will this explan the big bang?

put a

Step

right

an

If you're implying that all matter came from energy initially, then where did all that energy come from?

Mechanical

Not unless it was running on a microcontroller... :) No, this is just according to the classic laws of thermodynamics. Matter and energy are neither created nor destroyed, just changing forms. If you have a resevoir of water and run it over a water wheel into a pond, there will be exactly as much water afterwards as before, but some of it will have evaporated, some of it will have soaked into the water wheel, some has spilled out of the wheel onto the ground, but it's all there. All of the potential energy that the water had in the upper resevoir is still there, too. Some of it is did work on the water wheel, some of it was changed into thermal energy because of friction on the wheel, some of it was converted to sound energy in the air that you heard as splashing, but the total amount of energy didn't change. The same thing happens with the electrons (and their energy) in a circuit. All of the electrons went somewhere. All of the energy went somewhere. Once you start getting into nuclear reactions, then you can indeed see some matter and energy change places.

-Cheers,

Travis

Well, that's ABSOLUTELY an ASSUMPTION, and you MAYBE ABSOLUTELY correct when saying "Power_out is ALWAYS equal to the power_in".

Cheer,

surely you've heard of antimatter and dark energy?

"Marlboro" skrev i melding news: snipped-for-privacy@posting.google.com...

or

Just

reverse?

the

in,

usually

After reading the tread, now I understand what Travis Hayes men with "Power_out". For him it's the electrical power_out + thermal power_out. When I'm talking about electrical circuits/devices, power_out is only the electrical power_out. Especially voltage converters, amplifiers, an that kind of things.

step up dc voltage with a dc..to dc..converter..I frequently use a