is it possible to control a 3 level elevator (with inner and outer request buttons) without a microcontroller? is there other alternatives?

 

The best option will be a microcontroller, as I see it. But you can actually use many types of logic. Like discrete gates, AND, OR, XOR etc.

 

is it possible to control a 3 level elevator (with inner and outer request buttons) without a microcontroller? is there other alternatives?

Just think about it. They had elevators in 1920, right? Did they have microcontrollers? No they didn´t, they could do almost anything with enough relays.

 

I made one for a friend to move laundry between three floors using only CMOS logic ICs. Make a flow chart and it gets pretty simple. You need switches at each floor so the logic knows where the platform is.

 

so how do you make a relay circuit for the elevator? any ideas? what kind of relays do i need for the best results?

 

theanih

Read the thread on "dumbwaiter control system". Be aware that this is for a dumbwaiter lift system and is not meant for passenger loads. Elevators contain multiple redundent safety systems and "lift" systems do not.

williamj