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Battery suggestion

A

A371C

Jan 1, 1970
0
Any suggestion on how to build a battery from household material able to
power up an LED for a school project? ( Very preferable without caustic
chemicals).
Thanks,
 
D

daestrom

Jan 1, 1970
0
A371C said:
Any suggestion on how to build a battery from household material able to
power up an LED for a school project? ( Very preferable without caustic
chemicals).
Thanks,

--

For just an LED? You might try nickels, pennys, tissue paper and very salty
water. You just have to figure out the right way to stack them together ;-)

daestrom
 
R

Rein Wiehler

Jan 1, 1970
0
daestrom said:
For just an LED? You might try nickels, pennys, tissue paper and
very salty water. You just have to figure out the right way to stack
them together ;-)

daestrom

did National semi not give demos with oranges? I remeber some of these
reps went around to give demos of low current devices. used 3 or four
oranges connected together to provide enough power to run a micro.
rw
 
A

A371C

Jan 1, 1970
0
I appreciate all the suggestions, but I am afraid that they will not
work. I should have specified what type of LED. White LED: forward
voltage 3.6V @20mA. BTW I am not the student, but I was a student just
50 years ago!
 
H

Harry Bloomfield

Jan 1, 1970
0
|
| I appreciate all the suggestions, but I am afraid that they will not
| work. I should have specified what type of LED. White LED: forward
| voltage 3.6V @20mA. BTW I am not the student, but I was a student just
| 50 years ago!
|
|

Two dissimilar pieces of metal plate (coins) pushed into fruit (orange,
lemon), wire several in series to produce more voltage.

--
Regards,
Harry (M1BYT)...

Remove the 'NOSPAM' in my email address to reply.

Free Amateur Radio Courses:-
http://www.ukradioamateur.org
 
D

daestrom

Jan 1, 1970
0
A371C said:
I appreciate all the suggestions, but I am afraid that they will not
work. I should have specified what type of LED. White LED: forward
voltage 3.6V @20mA. BTW I am not the student, but I was a student just
50 years ago!

If you build several 'cells' with penny and nickel with tissue paper between
them, you can then stack several of them together (letting the penney of
one, touch the nickel of the next). With less than two dollars worth of
coins, you should be able to get it.

daestrom
 
A371C said:
I appreciate all the suggestions, but I am afraid that they will not
work.

Of course they'll work. Add 'em up in series to get the
required voltage.

I should have specified what type of LED. White LED: forward
 
B

Bill Shymanski

Jan 1, 1970
0
Caustic chemicals are the best part of batteries. I don't think you can
actually *have* a battery without caustic chemicals.

OK, strictly speaking, sulfuric acid isn't caustic, it's acidic...but
you didn't want to just avoid
lye, did you?

As a demo in high school chem I took some lead flashing, cut it into
strips, stuck it into a 250 ml beaker full of dilute sulfuric acid,
charged it for a while, and then connected it to a 2 V pilot lamp which
lit quite nicely. You'd need at least two in series for a white LED -
probably 3. And it's a rechargeable battery, too.

Bill
 
B

Bill Shymanski

Jan 1, 1970
0
Guy Macon said:
Bill Shymanski said:
I don't think you can actually *have* a battery without caustic
[or acidic] chemicals.

Sure you can. An Aluminium/Air cell uses salt water as it's
electrolyte. Sea water works fine.


--
Hmmm...ok. But I bet sea water causes more corrosion than any other
substance on Earth!

Bill
 
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