I facilitated a camp where we learned how to make a potentiometer circuit using graphite from a pencil, an LED, a 9 volt battery, wire, and an alligator clip. The circuit allowed for the brightness of the LED to be adjusted. We incorporated these circuits into our own art projects.
Some of the finished projects
The circuit: The LED ground is connected to the battery and the LED power is connected to the alligator clip. The battery is continuously making contact with the graphite, and when the alligator clip makes contact with the graphite, the LED turns on. While the alligator clip is making contact with the graphite, the closer the clip is to the battery, the brighter the LED gets.
