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  1. motonik

    Distinguish between two ultrasonic transmitters

    I want to have two ultrasonic transmitters emit signals to three receivers for measuring distances and relative position of the transmitters to the receivers. The distance between the transmitters is about 1ft and the distance between the transmitters and receivers is about 3ft. If there is more...
  2. motonik

    Help on tracking motion of feet and wrist

    I am mechanical engineer with very little background on electrical engineering. I would like to create a device that tracks the position of the feet relative to the wrist. This is to be used outdoors for people that play sports and it is to be confined within an area of 15x30 meters. The idea...
  3. motonik

    Compression and torsion spring?

    I am designing a part which involves a cylinder and a rod that slides axially within the cylinder. I am looking for a spring that does 2 things a) compresses so that the rod slides within the cylinder and b) provides some torque so that the rod rotates to some degree (30-45 degrees) within the...
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