]]>Its entirely possible as ronsii pointed out to have current/voltage present in your earth/ground due to wiring issues elsewhere in the premises.
See http://en.wikipedia.org/wiki/Ground_and_neutral and http://en.wikipedia.org/wiki/Electrical … _countries for more details, particularly the section about 'tingle voltage filters' that are often put into dairy farms etc (cows are more sensitive than most humans...).
]]>ronsii wrote:The ground in the SD power supply(from the high voltage side) is connected to the NEG(-) lead to the main board which is also a ground to the chassis... if you are feeling a shock I would guess that your wiring in the house is at fault... ie. the house wiring ground wire is at a potential above 0 volts, the ground lead from your main panel may have a bad connection or something similar.
This has merit since when I unplug the USB it no longer happens. I do not own a voltometer but when I unplug the USB cable and put my lip to it I no longer feel the shock
Make sure that both devices have their ground plugs and that both of them are grounded properly.
]]>like the one below for less than $10 at any
building supply.
The ground in the SD power supply(from the high voltage side) is connected to the NEG(-) lead to the main board which is also a ground to the chassis... if you are feeling a shock I would guess that your wiring in the house is at fault... ie. the house wiring ground wire is at a potential above 0 volts, the ground lead from your main panel may have a bad connection or something similar.
This has merit since when I unplug the USB it no longer happens. I do not own a voltometer but when I unplug the USB cable and put my lip to it I no longer feel the shock
]]>]]>It's quite surprising your chassis has a charge.
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