Distance Sensor?

Discussion in 'The Projects Forum' started by robotkid249, Nov 8, 2009.

  1. robotkid249

    Thread Starter Member

    Mar 18, 2009
  2. someonesdad

    Senior Member

    Jul 7, 2009
    Possibly, but you'd have to know more about the optical and geometrical properties of both the sensor and emitter. Here, I'm envisioning that you'd put a reflector of known area in front of the emitter/sensor. Moving the reflector away from the emitter would cause less energy to be reflected back to the sensor, both due to the distance fall off as well as the geometry changes (smaller solid angle of the reflector). You'd have to manually calibrate the device and ensure that there wouldn't be interference from other reflectors.

    However, since the page says the optimum distance is 3 mm, my guess is that it would work only over a range on the order of a few cm. But it's cheap, so it certainly would be easy to try.