A Robotic Arm doesn't have to replicate the human arm. The most basic robotic arm I have found is the "Polar Co-ordinate Arm".

This arm only requires 3 motors.

1 to rotate the arm assembly (shoulder).
1 to change the angle of the forearm (elbow).
1 to extend retract the forearm (also elbow).

I hope this diagram helps, and is understandable.

Attached Images

polarcoordinate.jpg (78.9 KB, 460 views)

 

Well that's what i wanted to build a robotic arm with atleast of 6 degree of freedom
1 for shoulder movement
1 for forearm "
1 for elbow "
1 for wrist "
and 2 to replicate the fingers not more that 2 atleast to hold or grab somthing, if possible using the wireless controll through the RC.

Thanks for any comment

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http://lumpequation.blogspot.com

 

The motors used in the Lynx 5 are their own product or will i get them in a shop...If not then which motor should i use for the arm and does anybody have any idea how to make the arms more dextrous so that they could do something like fixing a screw or something at that level.....just for extra info. thx for the replies though

 

the motors that are used in the Lynx5 robot are easily available from any RC hobbyist store. there are 4 standard HiTech and 1 mini HiTech servos. i think you can use any brand other than HiTech.

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Beginner's Guide to Microcontrollers

 

it's great...........
i'm also working on the same project and with almost similiar ideas
:idea: we can add some functionality by using an input from the user in terms of degrees.

first for the no. of radians for elbow movement
then for the arm and so on.........