512Views7Replies

# What is the conductivity of Play Doh?

Sparkfun and Make both have squishy circuit recipes but I'd like to know the conductivity... anyone? thanks!

512Views7Replies

Sparkfun and Make both have squishy circuit recipes but I'd like to know the conductivity... anyone? thanks!

## Discussions

5 years ago

The conductive play doh recipe is fairly ubiquitus:

1-cup water

1-1/2 cups flour

1/4 cup salt

3 tbsp cream of tarter

1 tbsp Vegetable oil

food coloring

I measured the official play doh at 100k/170k (brown/blue color)...

Answer 5 years ago

What section and length of Playdoh ? RESISTIVITY is the unit we need to compare it with

Answer 5 years ago

based on my initial measurements it varies little based on length... i mean we're not talking about meters but inches...

Answer 5 years ago

It has to vary linearly with length, but by the square of the crosssection.

Answer 5 years ago

Steve, I think that assumes that the material has uniform conductivity everywhere (i.e., like a metal wire), which may not be a good assumption for Play-Doh.

If the conduction happens, for example, in more electrolytic "veins" between larger grains or nodules of dry dough, then I you might see subquadratic dependence (e.g., r log(r) instead of r

^{2}for the cross-section).Answer 5 years ago

True. Interesting to find out, and perhaps try graphite loaded clay !

5 years ago

I don't think they're using normal play doh...