Sensors and transducers have been very instrumental in the development of prosthetic devices. They allow prosthetic devices to closely mimic human limbs. In the example below, a smart/digital torque transducer in line with a stepper motor is providing torque & position feedback to an electronic feedback controller/wireless device. This feedback mechanism allows the person to have normal arm movements with control. Similar systems can also be setup within the knee to provide extra stability and automatically adjust and guide the knee. These advancements allow a person to go about his/her daily life without any interruptions.