Hey Ritika…
You mentioned two project name in your post.
As you describe you want as educational project but you have to make as industrial application. its not a minor project so you have to implemented as industrial application. I mean you project should worked on real time lift not on a simple DC Motor.
1 Voice based lift control system.
In this you want to interface Proximity sensor/ Limit switch to detect each floor and which is located at each floor.
Also need to interface Voice Kit HM2007 which is little bit critical and costly also.
also need to put push button on each floor as well as in lift.
For controlling AC/DC motor you have to operate Relay for high voltage switching.
So as per my knowledge project of this cost will be 15000 INR
Contact me if you want technical support as well as ready-made project
Tulan Kansagara
Aspire Tech, Rajkot(GJ)
9998958632