Hi im working on an elevator project and i have a couple quiestions.
How does the pulley system work, cuz i see everyone using weights?
I got an idea on how to use a micro controller but i wanna try using logic gates except i kind of forgot them. How can anyone kind of explain or give me an idea on logic gates. I for gto to mention that i plan to use sensors to tell wchich floor ur on.

 

Hi im working on an elevator project and i have a couple quiestions.
How does the pulley system work, cuz i see everyone using weights?

See this Wikipedia entry; about halfway down:
http://en.wikipedia.org/wiki/Counterweight
Then look here:
http://en.wikipedia.org/wiki/Elevator
Then look at this original drawing for the first elevator counterbalance patent:
http://upload.wikimedia.org/wikipedia/commons/f/f9/ElevatorPatentOtis1861.jpg

I got an idea on how to use a micro controller but i wanna try using logic gates except i kind of forgot them. How can anyone kind of explain or give me an idea on logic gates. I for gto to mention that i plan to use sensors to tell which floor ur on.

The most common logic IC series are the 74xx (TTL) and 4000 (CMOS).
TTL needs 4.5v to 5.5v for power.
CMOS can operate on ~3v to ~16v.

Wikipedia also has a list of 74xx and 4000 series ICs:
http://en.wikipedia.org/wiki/4000_series
http://en.wikipedia.org/wiki/List_of_4000_series_integrated_circuits
http://en.wikipedia.org/wiki/7400_series
http://en.wikipedia.org/wiki/List_of_7400_series_integrated_circuits