Before starting please make sure you read the Disclaimer, because such a hobby project can be all fun and games untill someone gets hurt.
Keeping that in mind let’s get started this little fun adventure 🙂
When you’re building a prosthetic hand, first you need to have a hand itself. You can either download an existing one or you can model one yourself.
Your hand will need to be articulated by something. In case of PrusaHand we’re using servos to flex fingers and another servo to articulate the thumb.
Servos need to be driven by something. That something can be arduino based microprocessor.
To have a control over the motor movement the arduino has to have some sort of the user input.