Systems, devices, and methods for a robotic digit and determining motions and positions thereof

A position transducer comprising:

• a printed circuit board (PCB), the PCB comprising:
• a first connector pad;
• a second connector pad;
• and
• a conductive trace comprising a first leg, a second leg, and a connecting portion that contiguously connects the first leg to the second leg to form a continuous trace, the first leg having a first end, the first end electrically communicatively coupled to the first connector pad, and the second leg having a second end, the second end electrically communicatively coupled to the second connector pad;
• and
• a wiper in sliding contact with the PCB, the wiper comprising a first blade and a second blade, the first blade electrically communicatively coupled to the first leg of the conductive trace, and the second blade electrically communicatively coupled to the second leg of the conductive trace, wherein, in operation, an electrical path length of a conductive path between the first connector pad and the second connector pad depends, at least in part, on a relative position of the PCB and the wiper.