| This trigger operates the reverse of our
photogate kits. The output of the light-activated trigger is
switched on when light shines on the detector. A laser pointer
works particularly well as a light source, since the
phototransistor is sensitive to visible light and has a narrow
angle of view. The LAT includes 6 feet of 2-conductor cable.
This can be cut into two lengths in order to
connect the output to a flash unit and also to move the photo
transistor to a
location away from the breadboard.
|