This unit of Light Emitting Diodes focuses on a series of three student-inquiries which guide students through a thorough investigation into the workings of a LED on the macro, nano and symbolic scale.
For this unit, students will need access to the following materials per group of 3-4 students:
High Voltage Digital Power Source (0-12V) with current adjustment
8-10 insulated wires with alligator clip heads
5 or more different visible LEDs comprised of a single extrinsic semiconductor material
5 ohm resistor
Stereoscope, microscope or magnifying glass
This unit will take a minimum of 7-85 minute block class periods for completion.