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'[PIC]: Potato Powered PIC?'
2002\02\27@181635 by Tony Brewer

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Is is possible to power the 12C508A using potatoes?
Or would some other vegetable or fruit work better?
Don't laugh, these are serious questions! :o)

Tony B.

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2002\02\27@183035 by Barry Gershenfeld

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Oh, my, you must be joking...Wait! You've never heard of the
great Spud Server Project?  Well, this is your lucky day...

http://world.std.com/~fwhite/spud/

Barry


At 11:03 PM 2/27/02 -0000, you wrote:
>Is is possible to power the 12C508A using potatoes?
>Or would some other vegetable or fruit work better?
>Don't laugh, these are serious questions! :o)
>
>Tony B.
>

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2002\02\27@183050 by Kirk Lovewell

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Maybe citrus would work.  How about a nice big
deep-cycle grapefruit?

Kirk

> Is is possible to power the 12C508A using potatoes?
> Or would some other vegetable or fruit work better?
> Don't laugh, these are serious questions! :o)
>
> Tony B.

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Yahoo! Greetings - Send FREE e-cards for every occasion!
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2002\02\27@183836 by 4HAZ

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----- From: "Tony Brewer"
> Is is possible to power the 12C508A using potatoes?
> Or would some other vegetable or fruit work better?
> Don't laugh, these are serious questions! :o)
>
> Tony B.

Actually in theory at least, lemons should work.
Insert a strip of copper and a strip of zinc (or galvanized sheetmetal) or
aluminum into each lemon, connect the copper side of one lemon to the zinc
side of the next. I am not sure how many you would need or if you would have
to parallel them for enough juice...

KF4HAZ - Lonnie

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2002\02\27@185046 by Claudio Tagliola

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LOL. I wanted to suggest this to the guy with the bait dispenser unit in
the jungle from a few days ago. Didn't know how to put it in english
though :)

{Original Message removed}

2002\02\27@193023 by hadirian

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It is possible. But I don't know how and how many potatoes.
I have heard that they did a similar thing in Iran.





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LOL. I wanted to suggest this to the guy with the bait dispenser unit in
the jungle from a few days ago. Didn't know how to put it in english
though :)

{Original Message removed}

2002\02\27@200032 by Jennifer Loiacono

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Yes, in fact we did it last weekend in at USF's annual Engineering Expo.
However, we found that potatoes don't work for very long.  The phosphoric
acid in the potatoes quickly runs dry (within a matter of minutes).

As others have already suggested, lemons (or other citrus fruits) will last
a little bit longer.

Galvanized roofing nails are also a good source of zinc.  We cut a few solid
copper o-rings from the lab - they work great - but I'm not sure of their
general availability.

Just curious... what is your application?

Jen

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2002\02\27@200907 by Jinx

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> Just curious... what is your application?

Potato picking ?

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2002\02\28@030950 by Douglas Wood

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I recently have been experimenting with fruit batteries. My daughter's
boyfriend came to me needing help with a school science project where he
needed to build a car that was propelled with a "chemical reaction". His
first thought was to use vinegar and baking soda to drive a pneumatic motor,
which weighed about five pounds! Unfortunately, by the time he would have
built a car big enough to support all of the equipment needed to generate
enough gas to drive the car, the thing would have needed several pounds of
soda and several gallons of vinegar!!!

I suggested driving a hobby DC motor/gear box combination with a fruit
battery. Slipping all of the interceding research, I found that plastic soda
bottle caps arranged in a honeycomb pattern (for density) filled with lemon
juice work the best. Each battery cell was filled roughly half with juice
and I used common zinc galvanized nails and copper mesh for the electrodes
(The copper mesh provided a greater surface area for the chemical reaction
to occur and produced about three times the current output when compared to
a copper nail).

Lemons work the best of all fruits (apples, oranges, lemon, limes, etc.)
that I tried. Other foods I tried included [chilli] peppers and potatoes
(potatoes are rechargeable!). The general rule of thumb is that a whole
lemon will produce approximately 1 mA at 1 Vdc. I used the bottle caps to
reduce the weight of the battery.

Hope that helps...

Douglas Wood
Software Engineer
.....dbwoodKILLspamspam@spam@kc.rr.com

Home of the EPICIS Development System for the PIC and SX
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{Original Message removed}

2002\02\28@062605 by Kevin Olalde

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Did you take any pictures?  I'm having trouble visualizing the mesh/nail setup.

Kevin

Douglas Wood wrote:
> I suggested driving a hobby DC motor/gear box combination with a fruit
> battery. Slipping all of the interceding research, I found that plastic soda
> bottle caps arranged in a honeycomb pattern (for density) filled with lemon
> juice work the best. Each battery cell was filled roughly half with juice
> and I used common zinc galvanized nails and copper mesh for the electrodes
> (The copper mesh provided a greater surface area for the chemical reaction
> to occur and produced about three times the current output when compared to
> a copper nail).

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2002\02\28@103316 by Paul Hutchinson

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Potato/Fruit powered digital clocks have been on the market for well over a
decade.

Edmund Scientific still sell one for $19:
http://www.scientificsonline.com/Products/DisplayProduct.cfm?productid=1026

Paul

{Quote hidden}

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2002\02\28@105932 by Martin Peach

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Short shelf life...maybe dried fruit would work too? Anybody tried sheets of
dried apricot or apple between copper and zinc foil? Rolled up like a jelly
roll?
/\/\/\/*=Martin

>
> ...I found that plastic soda
> bottle caps arranged in a honeycomb pattern (for density) filled with
lemon
> juice work the best. Each battery cell was filled roughly half with juice
> and I used common zinc galvanized nails and copper mesh for the electrodes
> (The copper mesh provided a greater surface area for the chemical reaction
> to occur and produced about three times the current output when compared
to
> a copper nail).
>
> Lemons work the best of all fruits (apples, oranges, lemon, limes, etc.)
> that I tried. Other foods I tried included [chilli] peppers and potatoes
> (potatoes are rechargeable!). The general rule of thumb is that a whole
> lemon will produce approximately 1 mA at 1 Vdc. I used the bottle caps to
> reduce the weight of the battery.

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2002\02\28@121733 by Douglas Wood

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part 1 1541 bytes content-type:text/plain; (decoded 7bit)

Sorry. No photos. However, here is a drawing of the cell. I found the copper
mesh at Hobby Lobby (a chain crafts store in the U.S.). The cell would
probably work even better if the nail were replaced with zinc mesh, but I
haven't been able to find any yet.

Douglas Wood
Software Engineer
dbwoodspamKILLspamkc.rr.com

Home of the EPICIS Development System for the PIC and SX
http://epicis.piclist.com

{Original Message removed}
part 2 31007 bytes content-type:application/pdf; (decode)

part 3 131 bytes
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2002\02\28@122225 by Andre Abelian

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I did the same thing that Attila  did but
I used a lemon instead and got some power.
Didn't run any thing with it yet.

Andre Abelian        



{Original Message removed}

2002\02\28@133842 by Peter L. Peres

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The best fruit is the most acid one, as in lemon. A Kiwi might work well
too. A single fruit (cell) is not enough, you need a few in series. Using
carbon + zinc electrodes you should get 1.5V per cell (fruit).

Peter

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2002\02\28@141706 by Eoin Ross

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A Kiwi is an endangered and protected flightless bird native to New Zealand ... I presume you mean a Kiwifruit (as in Grapefruit vs Grape fruit ; ) - which as you may imagine got it's name from the country it was developed in - and it's resemblance to the bird.

http://www.backpack-newzealand.com/gallery/pages/kiwi.html
Pet peeve mode now turned off :)  
>>> .....plpKILLspamspam.....ACTCOM.CO.IL 02/28/02 01:36PM >>>
<Snip> A Kiwi might work well too. <snip>

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2002\02\28@154351 by Attila Muhi

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>(potatoes are rechargeable!).
Driving DC through it causes a green spot to appear around the anode or cathode, don't remember which one. Must be some reaction with copper ?

Attila Muhi - SM4RAN

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'[PIC]: Potato Powered PIC?'
2002\03\01@131643 by Peter L. Peres
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>I did the same thing that Attila  did but
>I used a lemon instead and got some power.
>Didn't run any thing with it yet.

You can make a Volta style battery using slices of fruit, coins (copper -
more exactly bronze) and zinc plated mild steel. You make a vertical stack
of them. You can get pretty high voltage for a short time (certainly
enough to bite you, especially with wet hands). I saw this once in a book
about science fair experiments (for kids). The original recipe used
blotting paper soaked in lemon juice instead of fruit slices. Volta used a
strong acid afaik.

Peter

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2002\03\01@132434 by Peter L. Peres

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>A Kiwi is an endangered and protected flightless bird native to New =
>Zealand ... I presume you mean a Kiwifruit (as in Grapefruit vs Grape =
>fruit ; ) - which as you may imagine got it's name from the country it
>was = developed in - and it's resemblance to the bird.

Ah, I did not know that there was a bbird with that name. I meant
Kiwifruit (which everyone except NZ natives seems to call Kiwi - eh). The
point is that the Kiwi contains even more acid than a lemon so it would
make a better battery imho. It can also be sliced very thin without
trouble (you can't do that with lemons). I also happen to be fond of
Kiwis... (not Kiwi pies, the fuit kind ;-)

Peter

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2002\03\01@141726 by Martin Peach

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It's a kind of gooseberry isn't it? Gooseberrys (sometimes) have spines
where Kiwifruit have fur...They are sour too. Better for battery powered
watches though because they are smaller ;)
/\/\/\/*=Martin

{Original Message removed}

2002\03\01@143825 by WEBB,TIM (A-Sonoma,ex1)

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I wonder if the potato or lemon would re-charge itself if it was kept alive
ie Still planted in the ground or on the tree.

{Original Message removed}

2002\03\02@123507 by Tony Brewer

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Many thanks to everyone for the replies!

Tony B.

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2002\03\12@214337 by Larry G. Nelson Sr.

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A few years ago my son did a science fair experiment on electricity from
fruits and vegetables and got the best results from cabbage. It beat lemon
and that surprised me.
Larry



At 02:08 AM 2/28/02 -0600, you wrote:
{Quote hidden}

>{Original Message removed}

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