loading
Picture of Miller- Penny battery
Okay, so I've looked around for an idea for an instructable. And I found one that I want to do my own rendition of, the penny battery. So this idea is not completely original, I'm not claiming it as mine. I'm just using the materials and methods that I think will be the most effective. My hope is to power and LED light or a small fan if possible. But if I make the led die, then I have sufficiently surpassed my expectations. Let's get started.
 
Remove these adsRemove these ads by Signing Up

Step 1: Materials

Picture of Materials
SandPaper.jpg
realemon-100-lemon-juice-48-oz-bottle.jpg
paper_towel_roll.jpg

These are all the things you will need. I will include my list as well as some substitutes that I've seen.

5-7 Pennies
Paper towels (I used shop towels, but I've seen everything from cardboard to cloth)
Lemon juice (salt or vinegar works too)
Sand paper
Tape-recommended
LED

Step 2: Sand pennies


Take the sand paper and sand one side of each penny down til the copper is off that side and the zinc core is showing. Best method is to use your finger to move the penny on the sandpaper as far as I know. (Technically defacing currency is a federal offense or something like that, but I'm sure you won't get arrested over 6 cents. Besides, it's recycling so shut up.)

Step 3: Make lemon juice solution

Picture of Make lemon juice solution
So, from what I can tell others have used salt water, vinegar water, well I'm gunna use lemon water. Lemons are more acidic than vinegar so I'm hoping it'll work better. Feel free to correct me if I'm wrong. But I will use 3/4 lemon juice, and maybe put some salt in for good measure.

Step 4: Soak paper towels


Cut your paper towels or whatever you use into pieces about the size of a penny, you don't want the pieces to touch. I'd just soak them for about 5-10 minutes.

Step 5: Stack your battery

Picture of Stack your battery
Start with a battery zinc side up, then put a piece of paper towel, then another penny same way as the first. It should alternate like this until you use all the pennys you want. 6 is the average I've seen, but I'm gunna try 7 just to see if I can maximize power. Or kill the LED for extra fun. The picture is showing how it works as a battery.

Step 6: Tape and Finish.

You did it!! You have made your own penny battery. And it hardly cost you a dime (BAD JOKE) Just tape it up if you wish to keep it together. You can also add an LED to make a flashlight,  use a multimeter to see how much voltage you get, or see if you can power a mini fan in the summer. Also, if you want to power something bigger or just see if you can make it better, try adding more pennies, it should create more voltage if it's an efficient design.

Heh. Kay Dudes your freakin me out here

PrzemysławM9 months ago

fake

mb inventor2 years ago
how long will this run for?
Alex Mercer3 years ago
Aaah...... I know.... There is electricity because... the lemon contains acid. HE HE HE.... I will use acid....
and the pennies divide + and -
mr_man4 years ago
Make sure the penny is dated 1983 or newer so you can be sure it has a zinc core.
Derek Vigil4 years ago
How powerful is the 6 cents?
saragorton4 years ago
i have tried your method but as i know it was a complete failure so i just used my dremel multie task tool
khaw4 years ago
The "defacing currency" statute is always misconstrued. It's only a crime if your intent is to commit a fraud (i.e. tear the corner off four $100 bills, tape them onto a $1 bill, turn the whole stack into the bank for $500). See http://www.straightdope.com/columns/read/1405/is-it-legal-to-put-a-hole-in-a-quarter-and-sell-it for details.
Great instructable...
Surprised they didn't make yours Featured! Hmmm
ttarler4 years ago
What the lemon solution is in chemistry is a salt bridge. All that matters here is that is an ionic solution. Since lemon acid is a weak acid it will not act as well as salt water, since there are less ions in the solution..
tom_morphew4 years ago
I haven't seen this before so thanks! I'm guessing this will not work with a UK penny? They are made from copper plated steel.
MadScott4 years ago
NP. You're allowed to "deface" coins to make jewelry (or batteries) so long as you don't use automated equipment to do it.