Newbie: tips on how to start?
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From: Rui Maciel on 14 Jul 2010 10:12 John Fields wrote: > On Mon, 12 Jul 2010 14:47:45 +0100, Rui Maciel <rui.maciel(a)gmail.com> > wrote: > >>I'm looking into picking up electronics as a hobby. What advice can you >>spare? > > --- > stay away from sci.electronics.design. ;) Why is that? Rui Maciel
From: Cydrome Leader on 14 Jul 2010 13:10 Sjouke Burry <burrynulnulfour(a)ppllaanneett.nnll> wrote: > Cydrome Leader wrote: >> JW <none(a)dev.null> wrote: >>> On Mon, 12 Jul 2010 21:06:30 +0000 (UTC) Cydrome Leader >>> <presence(a)MUNGEpanix.com> wrote in Message id: >>> <i1g04m$aig$2(a)reader1.panix.com>: >>> >>>> you can grab a cheap am radio, remove the cover and even just poke around >>>> at the parts while it's on. >>> Battery powered of course, if poking with your fingers! >> >> haha, yes. >> >> So what does mains shock feel like in places with 240? > > It makes you see stars, and makes your muscles contract violently. > And there might be a small burn mark. > Having good quality plastic soles under your shoes makes single contact > oke. Dont use leather soles. > My limit fo far is 2X500 volt from a falling radio I tried to catch..... > We both survived. > Automatic reflexes are so dangerous when you work with electricity. Interesting. Here in US with 120, the danger is almost always from what you end up hitting or falling off (like a ladder) /into than from the shock itself. I've never been burned from 120 or seen stars or anything like that. I've touched high voltage DC equipment where it doesn't even matter if only one hand is in the pocket or or anything like that. At 8kV you're getting a one handed shock unless you have special boots on. The last actual line voltage electrocution story from around here was from somebody running an electric drill outdoors on a hot day. They sweated into the drill, couldn't let go and died. How often do people drop dead from actual electrocutions in places that use 240, just doing plain tasks like you might at home or outside?
From: Baron on 14 Jul 2010 15:05 Cydrome Leader Inscribed thus: > Sjouke Burry <burrynulnulfour(a)ppllaanneett.nnll> wrote: >> Cydrome Leader wrote: >>> JW <none(a)dev.null> wrote: >>>> On Mon, 12 Jul 2010 21:06:30 +0000 (UTC) Cydrome Leader >>>> <presence(a)MUNGEpanix.com> wrote in Message id: >>>> <i1g04m$aig$2(a)reader1.panix.com>: >>>> >>>>> you can grab a cheap am radio, remove the cover and even just poke >>>>> around at the parts while it's on. >>>> Battery powered of course, if poking with your fingers! >>> >>> haha, yes. >>> >>> So what does mains shock feel like in places with 240? >> >> It makes you see stars, and makes your muscles contract violently. >> And there might be a small burn mark. >> Having good quality plastic soles under your shoes makes single >> contact oke. Dont use leather soles. >> My limit fo far is 2X500 volt from a falling radio I tried to >> catch..... We both survived. >> Automatic reflexes are so dangerous when you work with electricity. > > Interesting. > > Here in US with 120, the danger is almost always from what you end up > hitting or falling off (like a ladder) /into than from the shock > itself. > > I've never been burned from 120 or seen stars or anything like that. > I've touched high voltage DC equipment where it doesn't even matter if > only one hand is in the pocket or or anything like that. At 8kV you're > getting a one handed shock unless you have special boots on. > > The last actual line voltage electrocution story from around here was > from somebody running an electric drill outdoors on a hot day. They > sweated into the drill, couldn't let go and died. Possible, but I suspect an urban legend. > How often do people drop dead from actual electrocutions in places > that use 240, just doing plain tasks like you might at home or > outside? People do die from electrocution on 240 volt AC mains. More often than not the reflex action causes you to pull away. I agree with your comment that "the danger is almost always from what you end up hitting or falling off (like a ladder) /into than from the shock itself." DC is far more likely to kill you, simply because the muscle contracts and makes it impossible to let go. -- Best Regards: Baron.
From: Jamie on 14 Jul 2010 15:18 Baron wrote: > Cydrome Leader Inscribed thus: > > >>Sjouke Burry <burrynulnulfour(a)ppllaanneett.nnll> wrote: >> >>>Cydrome Leader wrote: >>> >>>>JW <none(a)dev.null> wrote: >>>> >>>>>On Mon, 12 Jul 2010 21:06:30 +0000 (UTC) Cydrome Leader >>>>><presence(a)MUNGEpanix.com> wrote in Message id: >>>>><i1g04m$aig$2(a)reader1.panix.com>: >>>>> >>>>> >>>>>>you can grab a cheap am radio, remove the cover and even just poke >>>>>>around at the parts while it's on. >>>>> >>>>>Battery powered of course, if poking with your fingers! >>>> >>>>haha, yes. >>>> >>>>So what does mains shock feel like in places with 240? >>> >>>It makes you see stars, and makes your muscles contract violently. >>>And there might be a small burn mark. >>>Having good quality plastic soles under your shoes makes single >>>contact oke. Dont use leather soles. >>>My limit fo far is 2X500 volt from a falling radio I tried to >>>catch..... We both survived. >>>Automatic reflexes are so dangerous when you work with electricity. >> >>Interesting. >> >>Here in US with 120, the danger is almost always from what you end up >>hitting or falling off (like a ladder) /into than from the shock >>itself. >> >>I've never been burned from 120 or seen stars or anything like that. >>I've touched high voltage DC equipment where it doesn't even matter if >>only one hand is in the pocket or or anything like that. At 8kV you're >>getting a one handed shock unless you have special boots on. >> >>The last actual line voltage electrocution story from around here was >>from somebody running an electric drill outdoors on a hot day. They >>sweated into the drill, couldn't let go and died. > > > Possible, but I suspect an urban legend. > > >>How often do people drop dead from actual electrocutions in places >>that use 240, just doing plain tasks like you might at home or >>outside? > > > People do die from electrocution on 240 volt AC mains. More often than ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ I would hope that to be the fact! :) > not the reflex action causes you to pull away. I agree with your > comment that "the danger is almost always from what you end up hitting > or falling off (like a ladder) /into than from the shock itself." > DC is far more likely to kill you, simply because the muscle contracts > and makes it impossible to let go. > -- "I'd rather have a bottle in front of me than a frontal lobotomy" "Daily Thought: SOME PEOPLE ARE LIKE SLINKIES. NOT REALLY GOOD FOR ANYTHING BUT THEY BRING A SMILE TO YOUR FACE WHEN PUSHED DOWN THE STAIRS. http://webpages.charter.net/jamie_5"
From: Cydrome Leader on 14 Jul 2010 20:04
Baron <baron.nospam(a)linuxmaniac.nospam.net> wrote: > Cydrome Leader Inscribed thus: > >> Sjouke Burry <burrynulnulfour(a)ppllaanneett.nnll> wrote: >>> Cydrome Leader wrote: >>>> JW <none(a)dev.null> wrote: >>>>> On Mon, 12 Jul 2010 21:06:30 +0000 (UTC) Cydrome Leader >>>>> <presence(a)MUNGEpanix.com> wrote in Message id: >>>>> <i1g04m$aig$2(a)reader1.panix.com>: >>>>> >>>>>> you can grab a cheap am radio, remove the cover and even just poke >>>>>> around at the parts while it's on. >>>>> Battery powered of course, if poking with your fingers! >>>> >>>> haha, yes. >>>> >>>> So what does mains shock feel like in places with 240? >>> >>> It makes you see stars, and makes your muscles contract violently. >>> And there might be a small burn mark. >>> Having good quality plastic soles under your shoes makes single >>> contact oke. Dont use leather soles. >>> My limit fo far is 2X500 volt from a falling radio I tried to >>> catch..... We both survived. >>> Automatic reflexes are so dangerous when you work with electricity. >> >> Interesting. >> >> Here in US with 120, the danger is almost always from what you end up >> hitting or falling off (like a ladder) /into than from the shock >> itself. >> >> I've never been burned from 120 or seen stars or anything like that. >> I've touched high voltage DC equipment where it doesn't even matter if >> only one hand is in the pocket or or anything like that. At 8kV you're >> getting a one handed shock unless you have special boots on. >> >> The last actual line voltage electrocution story from around here was >> from somebody running an electric drill outdoors on a hot day. They >> sweated into the drill, couldn't let go and died. > > Possible, but I suspect an urban legend. If the chicago suntimes or tribune had a functional search feature, you could locate the story, but that's a different story. >> How often do people drop dead from actual electrocutions in places >> that use 240, just doing plain tasks like you might at home or >> outside? > > People do die from electrocution on 240 volt AC mains. More often than > not the reflex action causes you to pull away. I agree with your > comment that "the danger is almost always from what you end up hitting > or falling off (like a ladder) /into than from the shock itself." > DC is far more likely to kill you, simply because the muscle contracts > and makes it impossible to let go. Is it 240 from either side of the line to ground, or how does that work? I asked all about this when I was in Ireland, but forgot the answer. |