Just guessing, FR power supplies blocks are really high-tech ones if they contain a usb-powered 230V power inverter in the same package :-D
to get 5VDC from 230VAC you need at least a transformer and a diode bridge + low voltage capacitors, or a step-down hasher like desktops/laptops power supplies. but, to get 230VAC from 5VDC, you will first need 5VAC with an oscillator, then a step-up transformer :) This is not something you'll find on a standard power supply plug :) Also, the shock would not be the same if you had been shocked with a normally operating 230v supply (I mean the amount of energy absorbed by your body) :) this is more likely to be a capacitor effect. There are some on the 230VAC side of all power supplies, to filter EMI. and a coil cannot store potential, it's a capacitor job :) a coil regulates spikes et reacts to transient voltages only. for DC current, a coil is a simple wire. sl 2008/10/9 Thorben Krueger <[EMAIL PROTECTED]> > It might be a case of the transformator working in reverse: A small > voltage applied to the usb output leads to a high voltage at the > prongs. This could also be caused by a capacitator on the low voltage > end, but I am not sure. > > Just guessing here. > > However, if you were to touch the prongs the moment they were out of > the socket, the coil could still hold some potential to shock you. > > Also just guessing. > > Thorben > > 2008/10/9 Christ van Willegen <[EMAIL PROTECTED]>: > > Hi, > > > > this morning, I pulled the FR adapter out of the (230 VAC) socket, and > > accidentally touched one of the prongs. I experienced a short shock. > > > > Is there a capacitor in there that can do that? It was fully out of > > the socket when I touched it! > > > > Christ van Willegen > > -- > > 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0 > > > > _______________________________________________ > > Openmoko community mailing list > > [email protected] > > http://lists.openmoko.org/mailman/listinfo/community > > > > _______________________________________________ > Openmoko community mailing list > [email protected] > http://lists.openmoko.org/mailman/listinfo/community >
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