I've been messing around with arduino for a little while and have got the basics down.
I would like to create a robotic arm that I can attach to a wall/ceiling/desk that has some sensor on the end instead of grippers and just "looks" and follows anything that moves in the room. Would like to add red LEDS like eyes or something too. I know I will be using servos to control all the motions, not sure what sensor to use for motion or material to use for the actual arm. Never done anything like this before, I usually mess around with obstacle avoidance robots and that's it.
Anyways, I was just hoping for some ideas on how I can go about doing this, specifically:
- Material to use for the arm (I tried cardboard to prototype with micro-servos but it is way to flimsy)
- Which sensor(s) I could use for the motion tracking
- For the "eye" whether I should use just a bunch of LEDS packed together or maybe I could get one large one?
- Ideas on how to actually make all the servos work together to follow the object
- Maybe some sound or lines the arm could read off through an arduino module?
- General advice on anything
I'm no expert on the subject, so I apologize if I'm overlooking anything critical. Hopefully, I've given you an good idea of what I'm going for, think GLADOS from the portal series, pretty much sums it up 
Looking forward to all the ideas/advice!
Seth