5.
P
LUTO SENSOR
M
ODES
Pluto trigger is an advanced MCU controlled device, which has several sensors
embedded in. These sensors are ideal for high-speed photography and trigger
traps.
High-speed photography usually uses The light/laser sensor and sound sensor can
respond to the light or sound change in a minimum delay (less than 1 millisecond).
The goal of the high-speed photography is capturing objects in motion. In all
cases you want to be able to detect a trigger, wait for an event and take a
picture. There are two methods for performing high-speed photography with the
timer. The first method uses a shutter of a camera. The second method uses an
electronic flash.
SHUTTER METHOD
The main advantage of the shutter method is that it can be used outdoors. The
subject and the background can be fully illuminated. Since the shutter is used to
freeze the motion of the subject, it offers a limited speed. Maximum speed of a
shutter could range from 1/4000sec to 1/8000sec, in some cases it may not be fast
enough (fast moving objects will become blurred).
Moreover, in cameras that have a focal plane shutter, a small slit moves across
the photographic plane at much slower speeds (1/250), thus exposing different
parts of the photographic plane at slightly different times.
Finally, there is a delay between the shutter release and the actual exposure. It
could be as much 100ms or more (depending on camera). In addition there
could be a small variation in timing, each time the camera takes a picture.
Therefore this method should not be used when high timing accuracy is required.
FLASH METHOD
The second method of high-speed photography is the flash method. The picture is
taken by opening the shutter of the camera, activating the flash and closing the
shutter. The picture needs to be taken in a dark room. Because the room is dark,
the long exposure time will not have any effect on the final output. The flash light
duration now becomes the actual exposure time. The main advantage of the