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-   -   Optica help please!! (http://classroom.all-science-fair-projects.com/forum/showthread.php?t=3184)

messejesse 10-29-2008 07:04 PM

Optica help please!!
 
:confused:
How can i make a simple projector of epidiascope to run off 12 volts or less?
How would i make a optical range finder that can measure distances up to 0.5km?
HOW WOULD I MAKE A LDR?!?!?
PLEASE HELP ME!!!
:confused::confused:


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