I-V characteristics of a Diode versus a Resistor. This lab measures the voltage drop across both a diode and a resistor as voltage is varied. The students will then discover the relationship between current and voltage.
Estimating the semiconductor band gap using LED's. This laboratory uses LED's placed in simple electrical circuits. It is an exercise to relate the composition of semiconductor materials to their behaviors. Finally you are asked to estimate the band gap of a semiconductor material.
Students apply electrodes to sintered ZnO disks from activity 5 in this module to make an electronic ceramic device. From their resistance, students find that bismuth-doped ZnO displays a variable resistance with applied voltage. Students also learn how transistors work and how grain boundaries affect conductivity.
MWM Ceramics Module: Design Project 1 – Designing a Low-Clamping Voltage Suppressor
Students create a low-threshold-voltage varistor based on Bi-doped ZnO powder. They systematically test three prototypes of the varistor and analyze the effect of varying a single design parameter on the overall performance of the varistor.
This design project builds upon concepts students learned in activities 3, 4, 5 and 6 of this module. Students use their knowledge to identify variables...