11-year old "engineer" needs counseling
in [Design]
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From: Michael A. Terrell on 17 Jan 2010 17:01 Tim Williams wrote: > > "Michael A. Terrell" <mike.terrell(a)earthlink.net> wrote in message > news:4B5350A6.5A8ABD82(a)earthlink.net... > > That's why I only use green wire for projects. No red or blue wire = > > no bomb. > > How do you get any signals through if they're all ground wires? ;-) Sure, but there is no ground at first... -- Greed is the root of all eBay.
From: Michael A. Terrell on 17 Jan 2010 17:03 krw wrote: > > On Sun, 17 Jan 2010 13:02:14 -0500, "Michael A. Terrell" > <mike.terrell(a)earthlink.net> wrote: > > > > >Falk Willberg wrote: > >> > >> J.A. Legris schrieb: > >> > On Jan 16, 5:53 pm, Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote: > >> >> On a sunny day (Sat, 16 Jan 2010 15:43:26 -0700) it happened don <don> wrote > >> >> in <HeGdne8ObvOX3M_WnZ2dnUVZ_jhi4...(a)forethought.net>: > >> >> > >> >>> http://www.signonsandiego.com/news/2010/jan/15/students-evacuated-sch... > >> >> US has turned into a bunch of paranoid schizofrenics. > >> > >> "A vice principal saw the student showing it to other students..." > >> Terrorists show their bombs around? > >> "... *empty* half-liter Gatorade bottle with some wires and other > >> electrical components..." > >> > >> > No, the U.S. has turned into a place where there's a reasonable chance > >> > of being harmed by crazies using anything from handguns, to assault > >> > rifles, to homemade bombs. > >> > >> Common sense. And common sense (Hollymood movies) teaches, that > >> cylindrical objects are not batteries but dynamite and the wires are > >> used to ignite the dynamite. > >> But it is also general knowledge how to deactivate any bomb: Wait for > >> the counter to go down to 00:05 and the cut the *blue* wire. (Never cut > >> the red wire!) > > > > > > That's why I only use green wire for projects. No red or blue wire = > >no bomb. > > That's what Joerg needs to do. No red wires, no blue wires, no > *phut!*. > > >> BTW: Are cars allowed near U.S. schools? > > > > > > Some high school kids drive to school. > > Don't all high schools allow this? Maybe by now, but some didn't have enough parking so the only ones allowed were the ones in the co-op programs and it was almost impossible to be assigned a space. -- Greed is the root of all eBay.
From: Michael A. Terrell on 17 Jan 2010 17:05 Spehro Pefhany wrote: > > On Sun, 17 Jan 2010 13:08:20 -0500, the renowned "Michael A. Terrell" > <mike.terrell(a)earthlink.net> wrote: > > > > >Jan Panteltje wrote: > >> > >> On a sunny day (Sat, 16 Jan 2010 16:28:37 -0800) it happened "Joel Koltner" > >> <zapwireDASHgroups(a)yahoo.com> wrote in > >> <WQs4n.51973$er1.24343(a)en-nntp-07.dc1.easynews.com>: > >> > >> ><don> wrote in message > >> >news:HeGdne8ObvOX3M_WnZ2dnUVZ_jhi4p2d(a)forethought.net... > >> >> http://www.signonsandiego.com/news/2010/jan/15/students-evacuated-school-chollas-view/ > >> > > >> >That's sad. I wonder what "school policies" he supposedly violated? > >> > > >> >A guy I'm acquainted with was telling me the other day that he build a Xenon > >> >flash bulb driver circuit from Popular Electronics back in the '80s, took it > >> >to school, and tried to convince his "friends" to touch the output terminals > >> >while he hit the trigger button. :-) > >> > > >> >I suppose these days you'd get expelled for that sort of thing... > >> > > >> >When I was in high school I built various "photogate" sensors and timers... > >> >the photogates were made out of PVC piping (cheap, strong, and readily > >> >available); no doubt that'd get you in trouble today too. > >> > > >> >Make Magazine must be considered terrorist literature by now... > >> > > >> >---Joel > >> > >> In high school I once brought a TV tube (CRT) for the physics teacher, > >> so we could do experiments with electron beam deflection. > >> What implosion danger, on the back of the bike... what wires :-) > >> What glass tube? > >> He did not want it, dunno why, but we stayed after school with a blackboard full > >> of equations about electrons... > >> Very inspiring guy. > >> > >> So, anyways, in these day I would be arrested and counselled for that? > >> Or worse, shot in the head first just in case it was dangerous, like they shot that > >> guy in the UK from South America who had a backpack? > >> Paranoid schizofrenia!! > >> And, let's face it, is is all because of GW Bush and his cronies. > >> How sick one nut case can make a whole population, how really really sad.. > > > > > > > > I took a 5" scope tube to school, to give to another student in the > >late '60s. Some idiots tried to have me thrown off the bus because "It > >will explode and kill everyone." the driver told them to shut up and > >sit down, then mumbled, "Damned Idiots!" > > The damned idiots today wouldn't even recognize the implosion risk, > then they'd freak out. In a few years, most won't even know what a CRT is. :( -- Greed is the root of all eBay.
From: pimpom on 17 Jan 2010 17:29 Spehro Pefhany wrote: > On Mon, 18 Jan 2010 03:10:35 +0530, the renowned "pimpom" > <pimpom(a)invalid.invalid> wrote: > >> Howard Eisenhauer wrote: >>> >>> >>> When I was in high school the physics teachers used to charge >>> up >>> capacitors & leave them lying around on the lab benches for >>> the >>> first >>> year students. One of my buddies got wise to this ahead of >>> time & >>> sprayed his fingertips with clear acrylic before class. Went >>> in, >>> picked up the cap, waited for the dissappointed look on >>> teach's >>> face >>> then handed it over to him. >>> >>> Priceless :> >>> >> >> I'm in one of the most remote regions of India where >> electricity >> other than batteries had been available for only a few years >> when >> I finished high school. Our science teacher, a French-Canadian >> RC >> brother in our mission school, told us that while mains >> voltage >> (230V over here) was dangerous, batteries weren't. To >> demonstrate, he brought a tube radio battery, inserted a pair >> of >> wires into the 90V outlet and held the ends with his (dry) >> hands. >> >> Most of us kids already knew it wasn't as simple as that, and >> one >> of my classmates told him to put both wire tips to his tongue. >> He >> did. /That/ too was priceless. > > 10 x 9V batteries in series would be just as effective. 9V batteries were still not in common use here then. It was either 90V or D cells. > > I don't think I've seen a 90V "B" battery since I was about 12, > and > even then it was probably an old dead one. How long ago were > they > available in remote regions of India? > > Don't remember for sure, but I think they were quite rare by the end of the 60s. Let's see..... I finished high school when I was 15 and started teaching myself electronics in my teens while doing my B.Sc. I remember designing and building mains adapters for legacy 90V tube radios. Yeah, transistors and proper mains-operated tubes had taken over by then and only those who'd bought those 90V sets in the 50s and early 60s had them by the end of the 60s and early 70s.
From: Archimedes' Lever on 17 Jan 2010 17:36
On Mon, 18 Jan 2010 03:59:36 +0530, "pimpom" <pimpom(a)invalid.invalid> wrote: >Spehro Pefhany wrote: >> On Mon, 18 Jan 2010 03:10:35 +0530, the renowned "pimpom" >> <pimpom(a)invalid.invalid> wrote: >> >>> Howard Eisenhauer wrote: >>>> >>>> >>>> When I was in high school the physics teachers used to charge >>>> up >>>> capacitors & leave them lying around on the lab benches for >>>> the >>>> first >>>> year students. One of my buddies got wise to this ahead of >>>> time & >>>> sprayed his fingertips with clear acrylic before class. Went >>>> in, >>>> picked up the cap, waited for the dissappointed look on >>>> teach's >>>> face >>>> then handed it over to him. >>>> >>>> Priceless :> >>>> >>> >>> I'm in one of the most remote regions of India where >>> electricity >>> other than batteries had been available for only a few years >>> when >>> I finished high school. Our science teacher, a French-Canadian >>> RC >>> brother in our mission school, told us that while mains >>> voltage >>> (230V over here) was dangerous, batteries weren't. To >>> demonstrate, he brought a tube radio battery, inserted a pair >>> of >>> wires into the 90V outlet and held the ends with his (dry) >>> hands. >>> >>> Most of us kids already knew it wasn't as simple as that, and >>> one >>> of my classmates told him to put both wire tips to his tongue. >>> He >>> did. /That/ too was priceless. >> >> 10 x 9V batteries in series would be just as effective. > >9V batteries were still not in common use here then. It was >either 90V or D cells. > >> >> I don't think I've seen a 90V "B" battery since I was about 12, >> and >> even then it was probably an old dead one. How long ago were >> they >> available in remote regions of India? >> >> >Don't remember for sure, but I think they were quite rare by the >end of the 60s. Let's see..... I finished high school when I was >15 and started teaching myself electronics in my teens while >doing my B.Sc. I remember designing and building mains adapters >for legacy 90V tube radios. Yeah, transistors and proper >mains-operated tubes had taken over by then and only those who'd >bought those 90V sets in the 50s and early 60s had them by the >end of the 60s and early 70s. > The "B" cells I remember were 63 Volts. |