Conductor Tester Project
Printable instructionsInstruction card, PDF
Download PDFWhat you need
- Blue conductive dough
- 1 LED
- Battery holder with 4 AA batteries
- Small objects to test, like a coin or a paper clip
Steps
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Roll out two pieces of blue dough about the same size.
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Connect an LED to both pieces of dough. Leave enough space between the pieces so they do not touch.
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Push the battery holder's red wire into the piece of dough with the LED's long leg and the black wire into the piece with the short leg. Turn on the battery holder to light up the LED.
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Cut the piece of dough with the black wire into two equal pieces. Move the piece still connected to the wire a little away from its other half to make a small gap. Keep the battery holder turned on.
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Your conductor tester is ready. Place an object across the gap so it touches both pieces of dough. If the LED lights up, the object is a conductor. If it does not, the object is an insulator.