Re: [CAD_CAM_EDM_DRO] Re: Lose A Few Volts

John Hansford wrote:

>Jon,
>Thanks for the help on this. I really appreciate it.
>I redid the picture.....
>
>http://www.flickr.com/photos/26361144@N00/
>
>
>

Yes, now it is right.

>I did a good bit of searching on how it works, but never did
>find the first diagram. I did find several using autotransformers
>but none like this.
>
>The small transformer in the sketch is a common radio shack
>"power" transformer....is that o.k. ?
>
>
>

Yes, but the secondary needs to be capable of handling the primary current
of the main transformer. This will still be a fairly small transformer,
though.
In this case, it needs a VA rating about 1/10th of the main transformer.

>And I may have to flip-flop the secondaries because it could
>be either adding or subtracting.
>
>
>

Yes.

>I think I've got it now. I am surprised that I couldn't find
>this done anywhere else, seems pretty useful to me.
>
>
>

It is called a buck/boost transformer.

Jon