On 1/23/2013 8:27 AM, William Bulley wrote: > Not higher voltage (measured using DC multimeter) - stable 4.5 VDC... > > The wall wart or plug pack is stamped or labeled with 4.5 VDC... and > was ordered as such from DigiKey. It is definitely DC because: > > 1) the DC multimeter so confirmed > > 2) I specified 4.5 VDC when I ordered from DigiKey > > 3) the sticker/label on the wall wart or plug pack says so > > > You could get the same results from a supply that is nothing more than a=20 step-down transformer followed by either a half-wave or full-wave=20 rectifier. The average voltage may well be 4.5V; this says nothing=20 about peak voltage. And yes, Digikey and many other vendors do sell=20 wall warts that operate like this. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .