11-year old "engineer" needs counseling
in [Design]
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From: krw on 17 Jan 2010 16:19 On Sun, 17 Jan 2010 19:37:41 GMT, Howard Eisenhauer <howarde(a)NOSPAMhfx.eastlink.ca> wrote: >On Sat, 16 Jan 2010 16:28:37 -0800, "Joel Koltner" ><zapwireDASHgroups(a)yahoo.com> wrote: > > >*Snip* > >> >>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 > > >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. One of our profs took a large cap and slid it behind his receptionist's chair (from a doorway behind her workstation) and laid a screwdriver across it. She pissed her pants. He had tenure. ;-)
From: Dirk Bruere at NeoPax on 17 Jan 2010 16:30 TheJoker wrote: > On Sun, 17 Jan 2010 20:31:01 +0000, Dirk Bruere at NeoPax > <dirk.bruere(a)gmail.com> wrote: > >> Of course, hero never thinks of simply pulling out the detonators. > > > If they still go off, so does the explosive package. The detonation > circuit is what ALL bomb disposal folks go after. > > Many have protections (BOOM) against det cap removal built into them. > How would you know? In which case, if the explosive is visible, cut it away. Of course, if the bomber is more than a retard it's going to have all kinds trips like tilt switches and proximity sensors. -- Dirk http://www.transcendence.me.uk/ - Transcendence UK http://www.theconsensus.org/ - A UK political party http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: pimpom on 17 Jan 2010 16:40 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.
From: Spehro Pefhany on 17 Jan 2010 17:02 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. 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? Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" speff(a)interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
From: Michael A. Terrell on 17 Jan 2010 17:00
Dirk Bruere at NeoPax wrote: > > Don't you recall the old saying? "Cut the red and you are dead" > Anyway, that's yet another Hollywood myth that pisses me off, like bombs > that have: > a) A convenient LED countdown It should be about 10 seconds slow. :) -- Greed is the root of all eBay. |