a problem for you

well i wanted to design an automated lighting system whose function is to switch it on when there is no light and vice versa when there is light which should be analogue.i have got the following components and i have to make the ciruit using only these componentsl.I would be grateful if you could send me the cicuit diagram in my email i.e. collective.ajay@gmail.com
components that i am authorized to use are

TRANSISTORS
LDR
RELAYS
RESISTORS
AC MAINS
DC SUPPLY

It is for school right?

search the web(google or yahoo) for "light sesor"

you shod find somting

O see:discover circuits

Check out the post "Drive anybody insane...GUARANTEED". Slight modification to the circuit and you have your light switch.

Hmm.

If your having problems with this, I suggest you pick up Dave Cutcher's book from here.