Converter (?) help needed

Tony Wells said:
Jerico, the "cross connects" are the electrolytic filter capacitors. They are polarized and should match polarity with the markings on the bridge. If you can find a large choke, fine, but a 120/12 stepdown transformer will sub as a choke. Just be sure you use the primary (120 side). Ignore, but make safe from shorts on the secondary. Wire nuts, etc.
Click to expand...

OK, I'm going to butt in here and ask a question, just for my knowledge,
So you would was the primary side of the t-former?
I thought I had read somewhere someone said to use the secondary side.
Thanks
Tony,
 
If you want to vary the DC voltage, a good way would be to use a
variac on the AC side of the circuit. It is basically a variable
transformer. I use one a lot in the shop mostly for my 4.5 inch
angle grinder. It is very simple to vary AC voltages and not so with DC.
The AC voltage can be varied from 0 to 100% of line voltage or more and will transfer
these relative voltages through your power supply circuit and you will have
infinitely variable direct current.
 
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