Advanced prosthetic hands like iLimb and beBionic can make life easier for a lot of people. They are not always cheap though. MechaHand is a more affordable solution that imitates the movement of human hand. It uses the ATmega2560 microcontroller.
The wrist rotates 0 to 180 degrees. Each finger has 3 joints. The hand is capable of picking up, holding objects and completing various tasks. The above video shows what it’s capable of.