EMERGENCY HELP it's Emergency I Mean It! T_T elp....Project?

Question

ahuhuhuhuhuhu... tomorrow I need to finish our project tomorrow waaa... its all about making a concept of a parking lot system meaning that i must make the concept of the whole system including switches, elevators, traffic lights etc... My god I am just 3rd yr COE but still i did'nt learned that much coz the instructors didn't thought us that us that much... ahuhuuhu... I just got finished with thet traffic lights system with swiches... but damn.. the concept of an elevator is damn hard to understand... 1st I had a 12v DC motor damn.... i know how to set it on its position for lifting... but theirs problems i encountered

1st is that how could a manupulated the up n downs of the elevator
by switching its poles with only one switch..

2nd when the elevator reaches the top or down how could it switch
its power to off..

3rd and finally after being off at the top how could i lock it with out letting if fall from the top.

Help me please i'm almost crazy of thinking.. thanks a lot T_T

Answer 1

Could you use the princibles of hydraulics to slove your problem. As the elevator reaches its point ( up or down ) it cuts of flow. Kind of like flipping a switch or blocking a valve. Hope this idea helps. Good luck on your project.