Cisco Switches/Routers

I _hate_ those wall-wart style PSUs. They're often recommended in electronics magazines over here as being a safe way to make a mains powered device. Sorry, even if I say so myself, Id much rather use a quality mains transoformer, in an earthed metal case, with fuses on all windings, and so on, wired by me. I can't put any safety logos on it, but my homebrew PSUs have never run hot, never caught fire, and never given even a minor shock, which is more than I can say pf wall-warts. Sounds like excessive ripple on the outputs. Some of these wall-warts are actually SMPUSs internally, and with one common-ish controller chip the darn thing will pulse on and off at about 1Hz if one of the cpaacitors fails. Took me a longh time to find that the first time... Again, if an SMPSU, a shoted chopper or similar will do this. On linear type supplies, I've had shorted rectifiers or smoothing capacitors get the transformer hot enough tomelt the case (no internal fusing, apparently the transformer primary is supposed to burn out safely under such condiitions, all I can say is that it didn't (the primary was still continuous after I unplugged the thing and let it cool down). -tony