Safe is a relative term... Household current is 'safe', unless you stick your fingers in the outlet, or take a bath with it. Don't be careless with electronics, there are worse things then a little shock that can happen.
E=I*R.. so voltage determines how much current flow for a given resistance. everyones body has different resistance within certain limits so you can kind of determine a range of voltages that will produce a harmful current in the body
It's the current that kills you, but you need enough voltage to drive the current through you. A low voltage source capable of delivering a million amps won't do anything since there is not enough voltage to drive that current past your skin resistance. Also, a high voltage, low current source like static electricity won't do much either since although it can drive the current, there's no current to drive!
Don't test with your finger, use a meter. Although... Even though I bought a meter that reads temperature, seldom dig out the probe to check and see if components are hot. Got a nasty burn off an LM317T...
I think that's a derivative of the real term "jury rigged" from the days where both prosecuting and defense teams tried to skew a jury panel in each of their favor.
I think that's a derivative of the real term "jury rigged" from the days where both prosecuting and defense teams tried to skew a jury panel in each of their favor.