This is my first Instructable so I hope everyone likes it.

This can be upscaled, but for this instructable it is used as a small test to show that this could produce voltage, even if it is a small amount.

Step 1: Materials:

-Pencil

-Knife

-Cup with lid

-Tin foil

-Water, Salt, Vinegar

-Something to poke a small hole with

Optional:

-Hot glue gun

-Multimeter

-someone to help you

Step 2: Beginning With the Pencil

First start off by shaving the pencil down to get to the lead. I used a utility knife to do this, but any knife will do.

(Note) Be careful when doing this because the lead is brittle and can snap easily.

Once you have shaved enough of the pencil to get about a 2 inch piece of lead, break or snap in off.

Step 3: The Lid and Foil

Poke a small hole in the lid of the cup you will be using just a bit smaller than the diameter of the lead and poke it through. Mine was snug enough that no hot glue was required. Then take some tin foil and roll it into about a 2 inch wide strip and twist it to make it more durable. Poke it through where the straw usually goes and just like the lead, no hot glue was required, but is optional.

Step 4: Prepare the Cup

Now that the lid is done, move to the ingredients. The solution I used was made up of 3/4 salt water and 1/4 vinegar. When testing this is what i got the most voltage from. I used about a table spoon of salt or so and stirred until dissolved. Then snap the lid on.

Step 5: Testing

When testing the "battery", It produced about 0.85v. This is a little over half of what a AA or AAA produces (1.5v). This was done in about an hour and required no hot glue or power tools.