Light sensor with built in pulse driver circuit
and sync detector. Useful as a wide-angle
proximity detector or for non-contact bump sensing.
The pulse driver modulates the output of an external
LED (not included). The LED will illuminate
the target with modulated light; reflected light in sync
with the output is detected by the S6986, making
detection relatively insensitive to ambient lighting.
This device is similar to the
Sharp IS471F Proximity Detector,
but with different frequency response and sensitivity.
In particular, the S6986 is sensitive to visible
light as well as infrared, making it ideal to use for a
long-range laser proximity detector.