This is the 5th arm i have made with 4 DOF
its the smallest one yet
it has a reach of 1000 mm
and a grab area of 15mm
its a standard arduino with a servo expansion board
programmed to take 3 coins from the user and deposit them
in the container on the back of the robot
it then lifts an object from A-B and then back again in a loop
https://www.youtube.com/watch?v=iCPt9KeKB5o
https://www.youtube.com/watch?v=iCPt9KeKB5o