ideas to imp (1 Viewer)

[sarah_]

uh, have a giant assessment task. can someone link me to some info on :
how a photocell can be used in light meters and 'electric eyes' in burglar alarms and door openers.
all the notes/summaries on this site just say examples of photocells are light meters and 'electric eyes' but don't discuss how they work.
cheers.

 

[untamedanimal]

www.yahoo.com
www.altavista.com
www.google.com

any othe search engine

 

[Rahul]

from memory, there is something like that in the jacaranda? not sure...have a look anyway

 

[cko]

would they have the answer in www.hsc.csu.ed.au? im not sure