I was on hackaday earlier this year and I found an article on squishy circuits. I thought making circuits from play dough sounded like a very interesting idea. I did some research into it and it seemed simple enough; different ingredients created different values of resistance and so on. I thought about it, and decided that I had to make some for myself. I threw some together and it worked great! In this instructable I will provide the recipe for conductive dough, insulating dough, as well as some ideas for circuits you can build out of it. I think this has enormous potential in a classroom setting, being able to teach students how circuits work, something that I didn't even understand until about three years ago. I can just imagine a whole class of students showing off their creations that glow, and make cool noises.
Step 1: Conductive dough
1 cup Water
1 1/2 cups Flour
1/4 cup Salt
3 Tbsp. Cream of Tartar*
1 Tbsp. Vegetable Oil
*9 Tbsp. of Lemon Juice may be Substituted
Mix water, 1cup of flour, salt, cream of tartar, vegetable oil, and food coloring in a medium sized pot.
Cook over medium heat and stir continuously.
The mixture will begin to boil and start to get chunky.
Keep stirring the mixture until it forms a ball in the center of the pot.
Once a ball forms, place the ball on a lightly floured surface.
Slowly knead the remaining flour into the ball until you’ve reached a desired consistency.