Well, modding related, just the usual finger cuts and such. And dremeled off most of my thumb. Tools in general, my dad has this electric screw driver (it pwns so hard), that rips a hole in my hand everytime I have to use it, from the vibrations. But damn, is it fun. Also, in response to the drunk dagger modding, I was at a friend's house, and we were playing with some new knives he had. On in particular, circular, with 3 blades sticking out. I grabbed it by the middle, and went to stab it into the wall. That's when I discovered that the little piece of metal that's supposed to lock the open blade in place didn't hold, and the blade folded over the back of my finger. That hurt like hell, bled like a mofo, and stopped me properly using my hand for about a month. Still have a nasty scar, I'll try and get a pic.
Depends on the current (Amps) more than the voltage. And believe me, PSUs can belt out a LOT of current on both the 12V and 5V line. Enough to indeed knock someone silly.
I always almost chopped a finger off or two, especially in the days when I had a p2 233 gateway pc - the case was a deathtrap when I tried to upgrade it!
eeurgh, the guy with the ankle laceration reminds me of my foot, as it throbbed when i saw the pix. i was rushing down the stairs one day two summers ago to do laundry and didnt see the glass sitting on the step for the laundry basket in my arms... stepped down onto and shattered the glass with my right foot. got a 1 inch wide by 1 and 1/2 inch deep cut in my foot just behind the ball of my foot. ill edit in the pic of my scar one day. still quite visible, more so than the more recent scar i got when i tried hopping a fence and got a spike from a farming implement in the heel of my foot. yeah, feet have alot of nerve endings. and when it gets cold, i can feel every one of em.
I was installing a cd-burner in a friends cheapie case and wiggling back and forth one of those aluminum filler plates, it came off when i wasn;t expecting and i sliced the hell out of the web of my thumb, bled like a son of a....
Too many cuts to list but my most recent one was when I was removing a fan grate and the cutting wheel on the dremel shattered. No significant blood drawn but there were some small scrapes just below my right eye, who needs saftey glasses anyway.
I thought I could stop a dremel at full speed with my bare hand.....I broke the blade.....but got major scars
Here's one, I was whittling something out of wood with my Swiss Army knife, and I was paying attention to my cousin who was yelling at my other cousin, rather than paying attention to my work. Needless to say, after one particularly strong whittle-stroke, the knife came back up under the wood and my finger was in the way when it closed. I almost lost the top knuckle of my index finger. In my engineering class last year, we used to have fun sticking resistors of various sizes into the 120V power outlets (which our teacher absolutely flips on us for). Nice little *POP* and generally a really surprised looking person nearby. Other than that, I had a Papst fan that ran on 12V and pushed something like 90-100 cfm, and I didn't have it attached to my case, just sitting in the bottom to blow air over my GPU. One day, I decided it wasn't facing in the best angle, and, well...it almost took my top knuckle off of my index finger (yes, the same one).
Come on now, there is no way that a 5V or 12V line can knock you across a room. I've shocked myself on my 450W power supply three times and only felt a slight shock. it's not like your shocking yourself with household (american) 120V current. Even that doesn't do too much other than give you a wierd sensation in your fingers and scare the sh*t out of you. In response to adamjones01101, Fans can be painful.
As said before, it would depend on the current and not the voltage. There could have been a short inside of the PSU that allowed for more current to pass thorugh then what should have been. You do know that you can die from a 5V shock, don't you? Again it's not the voltage but the current. IIRC, it's something like .5mA that can kill you. That's not really a whole large amount.
My hands, though already scarred from an automobile accident (went through windshield on bike) are tore the (*&^(*&^ up from being a tech for a few years. Worst has to be a sliver of finger missing from a PSU accident (trying to mod a PSU's rails, testing it and it exploded-had crossed a wire unintentionally) and burning a ring on in the same accident. Those scars are still there after nearly two years...
You're still wrong. Current is dependant on the voltage. The formulae is: voltage ----------- = current resistance the resistance of the human body varies depending on where you are measuring, and the conductivity of your skin, but something like 20k (20,000) would be worst case. A shock from one finger to another on the same hand will only result in burns (if even that). The current path has to cross you're heart. That gives: 12 -------- = .0006 A (.6 mA) 20,000 Also, with shocks, it is AC voltage that is really dangerous. A DC shock actually defilibrates your heart. I know a electronics guy who's gotten 4 kV (4000 volts!) across the chest without harm (from working on tvs).
that's sort of true. it's the current that kills you, HOWEVER to get enough current to owercome the resistance in the skin you'll need pretty high voltage. i think it's 50ma across the heart that kills you. (earth fault (or whatever it's called)-protectors usually trip at 30ma IIRC) that menas that you will have to get shocked in both hands. 12 volts can hurt you if you have open wounds on your hands and the cables hit right in the wound. (when i say open wound, i mean a bleeding hole in the skin, not just a scar) electricity don't knock people over. it's just a disturbance of the nerves that control muscles. if the muscles in your feet gets a current that tells them to pull itself together, you'll jump at full force. ofcourse, it youy get a shock your reflexes often tells you to get away from the danger, and you jump. but that is yout brains doing, not the electricity. (actually, reflexes is handled by the spine(not sure about that one) edit: i'm too slow. comment to the above. CRT's usually run at 25-30KV. believe me.. that hurts, but is rarely dangerous. (as long as it doesn't go across your heart.)
i know current and voltage are linked, (so it is always a combination of the two) but it is the VOLTAGE that is dangerous. Put it this way you see signs that say "danger high voltage" not current. A high current will ONLY flow if there is a high voltage.
there is a third factor aswell; resistance (R). if the resistance is low, it's the current (A) that is dangerous... if the resistance is high, then it's the voltage (U) that is dangerous. just ask Mr. Ohm
