Thank you all for the information. Will Wiki it too so I can look at a schematic or two of how it happens.
Dave K8WPE David J. Wilcox K8WPE’s iPad > On Jul 30, 2019, at 8:55 AM, Don Wilhelm <[email protected]> wrote: > > David, > > Insensitivity to input voltage is characteristic of a switching power supply. > The switcher input takes power from the AC line, rectifies it and stores the > energy in an inductor. Then the switching circuit takes the inductor energy > and dumps charge in a capacitor in its output to the desired output voltage. > Unlike a linear supply, no transformer or linear regulators are required. > > This is greatly oversimplifying the circuits and operation of a switching > supply, much additional design must go into it to control the switching > circuit, component rise and fall times and output filtering. > > 73, > Don W3FPR > >> On 7/30/2019 5:41 AM, David Wilcox via Elecraft wrote: >> I also have one of these power supplies and am very happy with it. Can >> someone please explain how it knows what voltage is input (120 v versus 240 >> v) to get the same 12 volts output. Is there a different power cord? Am >> sure it needs the correct wall plug adapter. Or is there just a 12 volt >> regulator in the output? Inquiring minds (my old 74 year old one at least) >> want to know. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
