hi everybody,
i was looking for a project "Simple combination lock".
it was a perfect project to give to my teacher but still something else needed.
it should be a counter with the "NOT GO" LED
so, if i tried 3 times with a wrong password to give an alarm or any simple signal like another LED .
i have to give the project today evening so please if any body can help me and i'll be thankfull.
Saed Sweity
Palestine

 

I would say, build a time machine, Go back in time to when the assignment was given, and start then. but because you dont have the parts to build a time machine, here:

http://www.zen22142.zen.co.uk/Circuits/Switching/diglock.htm

here is a bunch

http://www.discovercircuits.com/E/elec-lock.htm

 

I've never seen a "NOT GO" LED
Would be handy on a Time Machine.

 

Would it not be an idea to post your current work. We have no clue on how to help you.