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Forums
4hv.org :: Forums :: General Science and Electronics
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Ambient Energy LED lighting contest!

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ShawnLG
Sun Feb 25 2007, 03:40AM
ShawnLG Registered Member #286 Joined: Mon Mar 06 2006, 04:52AM
Location:
Posts: 399
"If you need light, shake gently "
What would happend if you shake it vigerously?

Speaking of shaking magnets in coils, I have one of those shake flashlight and a fake one too. Below is a picture of the fake one. The coil is fake. the magnet is fake. It is a piece of metal. If you look closely you can see two CR2032 batteries in it.

1172374838 286 FT20570 Shake Light
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...
Sun Feb 25 2007, 05:23AM
... Registered Member #56 Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
lol at the fake one amazed

Shaking vigorously does not seem to help a whole lot, in fact the brightest light can be had from just dropping the magnet through the core. Somewhat interestingly, the LED lights up regardless of which direction the magnet moves.

BTW
I just had a good idea for a new entry, put a little windmill in front of the exhaust fan on your computer tongue
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Bored Chemist
Sun Feb 25 2007, 09:23AM
Bored Chemist Registered Member #193 Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
Hazmatt, you asked "Did anyone stop to think about a Hydrogen gas station with a leak? That's a huge explosion, much bigger then a gas fire."
The answer is yes, someone did.
Years ago when the "hydrogen ecconomy" was first being talked about someone went and found a lake in an unoccupied area, emptied a tanker truck full of liquid hydrogen onto it, waited 10 minutes then went back and lit a match.
Just as soon as someone does that with gasoline they will prove that hydrogen is dangerously flammable.
For Christ's sake- it's a fuel- of course it's flammable. The hazards are different from petrol, but not particulalrly greater.
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CM
Sun Feb 25 2007, 12:47PM
CM Banned on April 7, 2007
Registered Member #277 Joined: Fri Mar 03 2006, 10:15AM
Location: Florida
Posts: 157
Bored Chemist:

Okay, admittedly this is slightly OT, but I do have a quick question for Bored Chemist in regard to his above post. I hope that's okay. B.C. you would know the answer better than I to this question. Seems somewhere I read that eventho Hydrogen is more volatile than gasoline, in cases of leakage (at the pump or in an idling car at a stop light, etc) that hydrogen fumes disperse into the environmental air much more quickly compared to gasoline fumes which tend to linger around the leakage area, thus (as the article claimed) hydrogen is likely to be less suspectable to explosions due to external stray sparks compared to gasoline. I am interested to learn, from an experienced Chemist's viewpoint... is this likely to be true... or is it bs? Thanks in advance. CM
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Alex
Sun Feb 25 2007, 05:24PM
Alex Geometrically Frustrated
Registered Member #6 Joined: Thu Feb 02 2006, 04:18AM
Location: Bowdoin, Maine
Posts: 373
Please don't hijack threads, if you have a question for BC, you can PM him.

If you guys want to talk about hydrogen powered cars, you're welcome to make a new thread. This thread is about lighting LEDs. Let's keep it to that.
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CM
Sun Feb 25 2007, 06:48PM
CM Banned on April 7, 2007
Registered Member #277 Joined: Fri Mar 03 2006, 10:15AM
Location: Florida
Posts: 157
Alex:

Understood.

Update on the earth battery approach to lighting the LED. We had a storm move through last night, lots of wind, rain, the usual. It seems the extra moisture boosted the V/ma output a bit, but that is expected as output should vary within a (+/-) range depending on soil moisture. Even the acid content of rain can effect output. I'm going to let it run as long as my wife will let the wires and mess remain in the side yard. It's not a very pretty installment as I did it on the fly, but the nice feature about earth batteries is that if one wishes, the installation can be completely concealed underground. The not-so-nice thing is that every so often you have to "feed" it more metal (man-made consumable) and sometimes water if you go through a drought period. So clearly, earth batteries are not 'the' answer to the energy question, but they can be considered one option for 'recycling' man-made metalic waste, that might otherwise rust in a junk yard, into direct energy output. smile CM
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ragnar
Mon Feb 26 2007, 04:04AM
ragnar Registered Member #63 Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425
Somehow, discovering some underground junk and jamming some spikes down into it to form an 'earth battery' from which you could trickle-charge some sealed-lead-acid cells does kinda appeal to me.. especially if the buried crap is already there.
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Hazmatt_(The Underdog)
Mon Feb 26 2007, 06:07AM
Hazmatt_(The Underdog) Registered Member #135 Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
Is anyone going to construct the Zamboni dry pile?
I'd do it but I have to be doing other things right now.
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CM
Mon Feb 26 2007, 02:25PM
CM Banned on April 7, 2007
Registered Member #277 Joined: Fri Mar 03 2006, 10:15AM
Location: Florida
Posts: 157
Haz:

Months ago, during R&D on my ion antenna, I researched the Zamboni and similar dry piles, including receiving a quote from a 4hv.org member who has a lab to build several quite LARGE Zambonis for me (each battery several feet high each, with thousands of copper/zinc foils per battery) Link2 But ultimately decided against, due to low power output. The advantage to Zambonis is that they can last for decades with little to no maintanance, the negative aspect to the historical standard design of the Zamboni is the very low useable output... good for generating weak electrostatic effects, low-level HV, science experiments or sometimes powering clocks, electrostatic pendulums/bells, or other devices that require extremely low power and/or only partial duty cycle. That being said, it shouldn't stop someone from building one to see if it could dimly light an LED. CM

"In 1815, Giuseppe Zamboni (1776-1846) of Verona invented and showed another electrostatic clock run with dry pile battery and an oscillating orb. Zambodi's clock....operated on one battery for over 50 years." Link2
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Reaching
Mon Feb 26 2007, 10:19PM
Reaching Registered Member #76 Joined: Thu Feb 09 2006, 10:04AM
Location: Hemer, Germany
Posts: 458
mhh, this earth battery thing is really interesting. i have to try it sometime.
mh, do you think it is possible to stack lots of these batterys in series for more voltage, placed on a large area, a hectar or so?. if you have a ground without many stones etc you can push the metal some feet in the earth to get higher output current and more efficiency.
hehe, really like the idea to power a radio or so with energy from my garden cheesey .

but if you guys want to get all the energy for free, why not build a universal powerplant, with solar cells wind mills, some thermoelectric things to make energy from temparature differences, . maybe a big rain collector to power a generator from falling water etc. there are many posibilities.

ive heard from generators powered from the heat that organic waste produces. tongue
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