Guide
www.SquishyCircuits.com Page 5
By performing some algebra, we can then rearrange the equation to find the resistance of the
conductive dough:
=
∗
=
Breadboards
Breadboards are extremely useful prototyping tools because they allow you to quickly and easily
connect multiple electrical components together. They are arranged in a grid with each column of 5
connected to each other. There are also two power rails, blue for ground and red for positive. There are
two sides of a breadboard and they are separated from each other. In the image below, the
connections are shown with lines connecting the squares. When using breadboards, resistors, wires, and
other components are inserted into each of the squares.
.
The equation that describes a voltage divider is:
=
∗
For these projects, we know that:
R
1
= 470 ohms
Vin = 5 volts
and V
out
is measured by the Arduino’s analog input.