EEL5666 – Spring 2005 Special Sensor Report R. Michael Ihns.

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Presentation transcript:

EEL5666 – Spring 2005 Special Sensor Report R. Michael Ihns

Sensors Solar Panel and Charging Circuit Infrared Sensor – Edge detection Ultrasonic Ranger – Obstacle Avoidance Pyroelectric Sensor – Wake up Input 3 CDS – Light Direction Sensing 1 CDS – Ambient Light Level Sensing

Solar Panel Array and Li-Poly Cell Solar Panel 8.5V 100mA Battery 7.4V 730mAh 31 grams Edmund Scientifics Solar Cell, Thunder Power Li-Poly Cell

Lithium Polymer Charge Curve

Circuit Diagram

Testing Property MeasuredValue Battery Voltage1.11V Solar Panel Voltage8.25V Short-Circuit Current70mA Current Through Battery70mA Property MeasuredValue Initial Battery Voltage7.71V Solar Panel Voltage V Short-Circuit Current90mA Current Through Battery10mA End Battery Voltage7.72V 2-Cell Lithium-Polymer Battery in 4.5 Hours of Full Sunlight Single Cell 1.2V AA Nickel-Metal Hydride Battery

Conclusion Need higher voltage solar panel

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