Application Examples (11)
Electronic Lock

Photomicrosensors (photointerrupters) Application Examples

Typical application examples of Photomicrosensors (photointerrupters) are as follows. Even if the device is different, it may be useful for solving problems, so please refer to it.

Application Examples (11)

Electronic Lock

Motor rotation count


  • ・To count the number of motor rotations to control the position of the cylinder.

Issues & Requests

  • ・Need an ultra-compact reflective sensor to make the products thinner.
  • ・Want a sensor with a narrow range in the light current (IL) on circuit design.


  • ・Adopted model:
    Ultra-compact reflective Photomicrosensor (photointerrupter)
  • ・This is an ultra-compact reflective sensor with a thickness of 1.1 mm, which is ideal for thin devices with limited mounting space. In addition, its surface mount design eliminates leads protruding from the back of the board, which is effective for making devices thinner.
  • ・When detecting the black and white of a rotating disc, the signal-to-noise ratio is smaller than when detecting the presence of an object. Therefore, a sensor with a narrow light current range (ratio of upper and lower limit values) is required. This sensor is available with selectable photocurrent (EE-SY199 Rank B).

Recommended models: