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Old 11-19-2010, 11:30 PM   #16
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If I may ask RS, which field did you start in? Electrical or electronics?
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Old 11-19-2010, 11:33 PM   #17
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Actually, computer science. Most of what I know about electrical I learned myself or from others. When I was young I actually wanted to be an electrician, then ended up getting into computers which lead me to IT.

I started playing with electrical around the age of 12. It all started with a paper clip, a light bulb, and a small wire. Lot of shocks and sparks down the road from that point.... LOL
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Old 11-19-2010, 11:38 PM   #18
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Quote:
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It all started with a paper clip, a light bulb, and a small wire. Lot of shocks and sparks down the road from that point.... LOL
you did better than many. A lot start with just a paper clip
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Old 11-20-2010, 12:30 AM   #19
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lol. Kinda where I am. I started with... uhh... electrical I guess, just hooking lights to batteries and discovering series circuits "the hard way"... at that time my interest was electronics - audio mostly, which is what I ended up really learning, then realizing there was more money in computers and I could handle it, but I always liked the hardware stuff, pulling cable and such, drifted back into electrical, now I'm kinda straddling all three... I wire houses, network office buildings, design websites, record and engineer music, build amplifiers, and fix the occasional Dodge Caravan after it refuses to shut off until after it sets itself on fire.
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Old 11-20-2010, 07:45 AM   #20
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When I was a kid, back in the middle '50s, I had an Erector Set. Lots of pieces to make thing out of and one item was and electromagnet. This set had a motor and gear box, pulleys, string, screws, and directions. The directions were just extra stuff, who would think of reading them
Now this magnet, is was metal spool with two wires hanging out and some tape wrapped around the core to hold everything together. No such thing as a TR receptacle in those day, no GFI, no AFI, no ground,no nothing except two open slots in an duplex receptacle. Poof went the magnet.....

Last edited by a7ecorsair; 11-20-2010 at 07:45 AM. Reason: spelling
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Old 11-20-2010, 07:46 AM   #21
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Wont do anything unless it's reverse polarity.
Try it some time.
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Old 11-20-2010, 07:53 AM   #22
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Quote:
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No, it'll be a regular sine wave, which crosses through zero 60 times a second.
120 times a second
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Old 11-20-2010, 11:17 AM   #23
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Try it some time.
I tried it before posting. Wanted to make sure my theory was on right path. I never realized how nicely a flat head fits into a 20 amp slot.
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Old 11-20-2010, 11:22 AM   #24
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Quote:
Originally Posted by a7ecorsair View Post
When I was a kid, back in the middle '50s, I had an Erector Set. Lots of pieces to make thing out of and one item was and electromagnet. This set had a motor and gear box, pulleys, string, screws, and directions. The directions were just extra stuff, who would think of reading them
Now this magnet, is was metal spool with two wires hanging out and some tape wrapped around the core to hold everything together. No such thing as a TR receptacle in those day, no GFI, no AFI, no ground,no nothing except two open slots in an duplex receptacle. Poof went the magnet.....
I blew MANY wall plugged transformers playing with electromagnets as a kid. 5vdc ones, 12vdc ones think I even had a 24vdc one at one point.

I recall this particular electromagnet I built using a horseshoe magnet that had pretty much lost all it's force. I decided to try an experiment to see if I can "recharge" it. So I wrap wire around both ends, plug it in. A small metal bar that was maybe a foot away immediately swiped past my hand and unto the magnet with a loud DING. Think that would have hurt if my finger was in between that. A few minutes later it started to smell funny and it was the end of that adapter.
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Old 11-20-2010, 12:18 PM   #25
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Quote:
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120 times a second
D'oh! You can tell my specialty is digital electronics; I get a little mixed up when it comes to analog waveforms...
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Old 11-20-2010, 01:37 PM   #26
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Quote:
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I tried it before posting. Wanted to make sure my theory was on right path. I never realized how nicely a flat head fits into a 20 amp slot.
That is NOT a loaded neutral. Try holding on to the neutral of a circuit powering flourescent lights and then touching ground.
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Old 11-21-2010, 03:28 AM   #27
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Quote:
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That is NOT a loaded neutral. Try holding on to the neutral of a circuit powering flourescent lights and then touching ground.
I think you're confused. That won't do anything bad, either. After all, the other end of that wire is bonded directly to ground back at the panel. If you don't believe me and don't want to try it yourself, just measure the voltage between that neutral and ground - it'll be a couple volts at most. Inserting yourself *in series with* a loaded neutral will certainly light you up, though.
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