you are here: start> contents> light sensors Light sensors Light sensors booklet pdf file, containing Teacher’s notes, Technical notes, ‘About light sensors’ and Student Activities. Use the pdf if you want to print materials directly. Link to resources page   Student Activities Word files Use these files if you want to modify any of these resources for your students, or if you want students to work on these activities at a computer. Using a photodiode to measure Percentage Reflectance • Using two different LEDs and two different reflecting surfaces. Using a light dependent resistor (LDR) to measure illuminance: • Using a multimeter on its resistance range with the LDR • Using an LDR with a potential divider network and a voltmeter to measure illuminance • Using an LDR with a potential divider network and datalogging equipment to measure illuminance. |