Working Air Battery

[PeteIdl4]

[quote A=jeanna link=topic=9276.msg245540#msg245540 date=1276805949]
@pete,
Did you give us the details of the broken carbon rod thing?
It looks small and tidy, but I want details like how much of each material, please?
[/quote]

Hi Jeanna,
I Didn't take precise measurements, but I have a really good estimate:
The carbon rod is roughly 2 inches long with a 1/2 inch diameter.

I used 11 turns of mag ribbon, so Pi times diameter equals 1.57 inches times 11 equals a total of 17.27 inches of mag ribbon, lets just say 18 to be safe.

I used a regular paper towel that i soaked in the solution i had mentioned before, the mixture I used is about 4 cups of water 1 tbl spoon of salt and about another tbl spoon of baking soda.

I think that's about it I drilled a small hole at the top of the rod and i just stuck a breadboard jumper cable in there for the anode connection. Coincidentally this is almost exactly the same size of a AA battery . I hope this helps let me know if you have any more questions. Keep up the good work I'm a big fan of yours, lasersaber, lidmotor, and pirate's i really enjoy all of your videos and information everyone has shared.(sorry nerd moment )

-Pete

[jeanna]

Excellent!

I will give it a try.

I happen to have only broken welding rods and this looks good.

18 inches without the salt on a 5 inch carbon rod gave me barely enough for a red jtc, so I will do it again with the 2 salts to replicate and see. It will be a quick confirmation, which is always a good thing. 
Then I will make one with mg sulphate also.
We will get this down.

I got a 1" copper pipe today. The hardware store doesn't even carry 1 1/2 or 2" copper pipe anymore!
But it is bigger than the other one so it will show how much difference size of copper makes.

thank you,

jeanna

[conradelektro]

More experiments with paper kitchen towel soaked in salt water

My personal reference cell is still the "copper - tile cement - aluminium cell" as posted here:
http://www.overunity.com/index.php?topic=972.825
Re: Crystal Power CeLL by John Hutchison
« Reply #833 on: May 31, 2010, 11:22:17 PM »

The size of the metal sheets is 120 x 120 mm; the metals so far are copper, mild steel and aluminium with little holes.


copper - salt water paper - aluminium --> 0.5 Volt and 1 mA

mild steel - salt water paper - aluminium --> 0.2 Volt and 0.5 mA

copper - tile cement - aluminium --> 1.02 to 1.17 Volt and 0.15 mA (seems to work with air humidity)

Remarks:

- the salt water paper is drying out over night; somehow one has to keep the salt water from evaporating; may be it would be better to submerge the metal plates in a saltwater container (not very practical, but good enough in a big stationary battery with many plates)

- applying pressure on the stack to squeeze the salt water paper helps (as the builders of Stubblefield coils observed)


Of course, one wants graphite and magnesium, which should give up to 1.8 Volt in between in salt water. And acids or many other chemicals work much better than simple table salt. But I am exploring easy to get materials and practical setups; sturdy, easy to build, easy to handle, readily available materials possibly for free like aluminium soda cans, steel from abandoned cars and ordinary salt or possibly sea water.


I posted a few more details about the tile cement:
http://www.overunity.com/index.php?topic=972.840
Re: Crystal Power CeLL by John Hutchison
« Reply #853 on: June 18, 2010 at 10:44:34 AM »


@ Lasersaber:

In this thread, do we discuss graphite - magnesium batteries only, or also other materials?


Greetings, Conrad

[jeanna]

Hi everyone.
It is time for a little entertainment.
I made a "AA" battery from C and Mg yesterday as Pete showed.

In the first shot it is newly made. You can see the magnesium pretty clearly.
In the second one the 2 leds which are in series are still on after about 24 hours.
I learned the other day that in this jtc if I add a 47uF cap across the leads the light flicker is so fast it is beyond seeing, whereas the 1F memory cap stores more and then lights the light brighter, but only some of the time, depending on the mA output of the battery.
So,
2 1/2 inches length carbon rod (1/4-3/8"? diameter)
0.7 gr Mg ribbon
I also had to tie the Mg tight with a string to get it into close enough contact with the carbon rod.
2N2222 transistor, 470 ohm base r, 84T secondaary jtc
47uF cap across the leads.


#1= newly made
#2= after 24 hours running

jeanna

oops, I forgot to say I soaked the paper towel in epsom salts.
I know it works as a salt, and I am hoping it will outlast table salt and help keep the magnesium on the ribbon 

[jeanna]

Hi Pete
Your voltmeter is showing a reading of .57 volts. How are you able to run 3 LED's on this small amount of voltage?
Bill

I meant to answer this yesterday. Sorry for the delay.
When you are using a joule thief and you read across the leads, you will always have a reading of the battery output MINUS the use of the transistor.
so, it is safe to add back around 0.7v
Therefore Lasersaber's reading of 0.57v + 0.7v =1.34v .

jeanna