Sagar
I am looking at all of the replies and I am reminded by something pounded into my head during my engineering classes. The basic idea is reliablity and efficiency favors simplicity. With that said a possiblity would be to use a simple pneumatic cylinder. A cylinder and compressor would be easy to obtain and control with electronics. If your thinking that noise is a problem you could also look into quieter compressors. Basically it would be simple, cheap, and effective. We did a project similar to this in high school with a pneumatic cylinder, a solenoid directional control valve, and a button and it worked incredibly well.
I am looking at all of the replies and I am reminded by something pounded into my head during my engineering classes. The basic idea is reliablity and efficiency favors simplicity. With that said a possiblity would be to use a simple pneumatic cylinder. A cylinder and compressor would be easy to obtain and control with electronics. If your thinking that noise is a problem you could also look into quieter compressors. Basically it would be simple, cheap, and effective. We did a project similar to this in high school with a pneumatic cylinder, a solenoid directional control valve, and a button and it worked incredibly well.