How to make a Salt Water Battery Lamp.

Salt water battery + Joule thief circuit.
Materials : Copper plate, Aluminum Foil, Kitchen Towel, Warm Salt water, Joule thief circuit
Bigger copper plate & Aluminum Foil is more powerful.
This battery lamp turned on one hour.. but if you replace salt water, it will be lasting until the foil almost erode.
33 thoughts on “How to make a Salt Water Battery Lamp.”
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where can i get this copper plate?
This copper plate from shielded electric cable.
+Kunal Bansal Iron or Silver plate are available.
+Thomas Kim is there an alternative for copper ?
Hi Thomas.Impressive work again. How long will light up led with this
circuit? does C1815 transistor work with lower voltage then 0,7v on Joule
Thief ? I wanna know if C1815 transistor works better on low voltage then
BC337 or D965.
+asifur rahman i think the metals will corrode very fast.
I didn’t test enough. I think less than 1 hour. But you can extend lighting
hours by change the salt water.
+Thomas Kim so if I use sea water.. Just curious
no good .i losed so money for your videos.never make hahaha .
it will.last until the metal corrode or the sollution netral…
To what degree the size of the cell and amount of salt water in it affects
the output voltage??
I see a lot of people on the internet calling these things a salt water
battery, but that’s actually a little misleading. The salt is just an
ionic conductor– none of the power comes from it, and the salt is not
depleted or used up ( the sodium and chloride don’t chemically react and
don’t change at all). The cell “runs down” for other reasons, and if you
cleaned the electrodes, stirred the solution, wrung out the paper towels
and wetted them again with the stirred solution, it would perform just as
before (assuming that the aluminum hadn’t all dissolved). All of the power
comes from the oxidation of aluminum.
At the aluminum electrode, the aluminum metal dissolves (oxidizes) and
reacts with water to form aluminum hydroxide, and that also produces
hydrogen ions and electrons:
Al + 3 (H2O) –> Al(OH)3 + 3 H+ + 3 electrons
At the copper electrode, water gets broken down to hydrogen molecules and
hydroxide ions, and that also uses the electrons produced at the aluminum
electrode.
2 (H2O) + 2 electrons –> H2 + 2 OH- (that’s OH-minus, as in sodium
hydroxide).
(But before those electrons get to travel from the aluminum electrode all
the way to the copper electrode, we use them to light an LED.)
The H+ produced at the aluminum electrode and the OH- produced at the
copper electrode eventually travel to where they can react with each other
to produce water. So there’s never actually an excess of either H+ or OH-
produced. One of the electrodes produces 3 electrons and the other one
uses 2, so you have to multiply the first one by 2 and the second by 3 to
get everything to balance, but after the dust settles (or the ions), here’s
what has happened:
6 (H2O) + 2Al –> 2 Al(OH)3 + 3H2
See? The salt doesn’t appear. It doesn’t do anything except provide a path
for all the ions to shuffle back & forth. What the salt does is allow the
electrical circuit to be completed all the way around, but it doesn’t
interact chemically.
You also notice, the copper doesn’t do anything. That’s right. It only
serves as an metal surface for the hydrogen gas to form on. For technical
reasons it happens to be a pretty good choice, but other metals could be
used to do the same thing and would give the same voltage in this cell as
copper. Platinum, for example, although that’d be really expensive.
Also, strictly speaking, it’s a cell and not a battery– if you hook up two
or more cells in series (the copper electrode of each cell connected to the
aluminum electrode of the next one) that’s called a battery. If you make a
battery with 2 cells it will have twice the voltage as one cell; if you use
3 cells it will have 3 times the voltage, etc.
Lets make a Toe Jam battery now. I’ll even kick in 🙂 …
+Dave Myers Its like the lemon battery people think that the copper is the
one being used up.
I often added salt into the water i drank… Salt and water created a lot
of Energy in my body.
It seems interesting (educational, but also practical).
How much time did the battery powered the LED (+ the oscillator)? I think
the total power does not exceed 100 mW in this case. So I would like to
appreciate the capacity (mAh).
how many volts/amps does it put out
can we recharge cellphones with this?
is it working with a motor?
hope it work’s
Is it true that the more salt the more voltage??
+Steve Thomas No its not…
Yea
Where is the energy coming from? The salt water or the metal plates?
+Dim Kit You are too harsh bro hahahhahahaa
+Ciroluiro basically it comes from the difference in electronnegativity and
work function of the two metals, and if you have no knowledge of physics
would be hard to explain farther
By the oxidation of aluminum.
what things u take to make it, plss mention it
not work
so dose this meen you can use sea water and repeat the process on a larger
scale ?
why the liquid is in yellow colour
???
i pee in it…now u drink it
Is this the same principle as use to invent in Philippines by brother and
sister
http://www.upworthy.com/a-brother-and-sister-in-the-philippines-invented-a-lamp-that-runs-entirely-on-metal-and-salt-water?g=2