Lab 5 - Photoresister Laboratory

Lab 5 - Photoresister Laboratory - San Jos State University...

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Department of Mechanical and Aerospace Engineering ME-106: Mechatronics Laboratory Report: Photoresister Laboratory Submitted By Photoresister, Transister and LED’s 10/7/08 Report Author: Lab Date: 10/1/08 Summary This report demonstrates how to use CdS photoresister, red LED’s, FET’s and 2N3904,NPN transistor as power switching devices with the assistance of the ATmega 1
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128, STK500 & STK501, to measure the change of resistance of a sensor using with a light-controlled switch, photoresister. This experiment also describes the circuit constructed with a light-controlled switch. ___________________________ Results/Discussion In the lab room light exposure, the resistance of the photoresistor was recorded. After the top face of it is covered, the resistance of it is again recorded as the following table. The circuit is set up as the following figure. Table 1. Resistance of the photoresistor State of Photoresistor Resistance, k Uncovered 1.23 Covered 20 Figure 1. LED and typical circuit. (Furman, PH-1) The actual values for the the resistors were measured and they are displayed in table R.
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This note was uploaded on 09/08/2010 for the course ME 106 at San Jose State University .

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Lab 5 - Photoresister Laboratory - San Jos State University...

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