Electronics > Electronics

ADMIN HELP! PHOTOCELL/photoresistors

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knightimer:
heys, i was wondering wat photoresistors are for! and if they are nessescary for your $50 robot? and i was wondering about, why not just normal resistors? like the one on the microcontroller?

please & thanks

Admin:
http://www.societyofrobots.com/schematics_photoresistor.shtml

(no need to write Admin in the subject line, there are many other people that can help :P)

HDL_CinC_Dragon:
the photo resistors react to light. depending on the amount of resistance, the bot can make a decision about whats in front of it. A regular resistor will always have about the same resistance all the time

knightimer:
um, i still dont get what photoresistors are FOR, you only told me what they can do? no wait...ok. "What are photoresistors used for in a robot?, do they alter resistance or something?"

Admin:
They can sense light. Its like an eyeball, but for a robot.

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