220 AC to 220 DC Converter
So that the circuit being discussed can't be edited out from under this answer, here is what we are talking about:



There are so many things wrong here, it's hard to decide where to begin.

A 220 Vrms sine wave has peaks of 311 V.  Minus a couple of diode drops, let's say you will get 310 V on C1.

"25W" is a nonsensical rating for a capacitor.

Try finding a 1 mF 350 V cap, and you will see how expensive those are.

"25W" makes no sense for the diodes in this context.  This shows you really don't understand Volts, Amps, and Watts.

100 &Omega; for R1? Really!? Clearly you haven't even thought about doing the math.  (310 V)2/(100 &Omega;) = 960 W.  R1 will basically be a 1 kW space heater.  That's about the size it would need to be to not blow up.

220 VAC at 50 Hz sounds suspiciously like the power line.  If so, this circuit is quite dangerous.  The top side of R1 will be at dangerously high voltage and ground-referenced to other things in your house.  You can easily be killed by touching that node and something like a water faucet.  There are other less obvious ground points in your house, so it's nowhere near as obvious as avoiding faucets.

You show the bottom of R1 as ground, but that's just what you call it.  It might also be lethal, depending on how exactly the 220 VAC is wired, and which way around the plug is installed.  One or more diodes may even blow up if you try to connect your ground to real ground.



So how to fix this mess? Frankly, someone with so little understanding of electronics and the dangers of high voltage shouldn't even be here.  Go buy a off the shelf adjustable power supply that goes up to the voltage you want.  Let someone else that actually understands these things design it and make it at least as safe as a 200+ V output allows.

There are ways a more skilled amateur could achieve what you want, but teaching all that is required just to understand the answer is beyond the scope of this Q&amp;A site.