Abstract:
Chopper clock is designed on the basis of the phenomenon of persistence of vision.
Which means that the human eye and brain can only process 10 to 12 separate images
per second, retaining an image for up to a fifteenth of a second. We will use this
phenomenon to display a live clock that shows time, date, in addition to messages and
simple pictures on a set of rotating LEDs
One of the main problems that confront us in this project of is the instability of the
movement of the DC Motor, which leaded to irregular movement and irregularity of
display shapes.
The rotary encoder is used with the DC Motor to solve this problem, so as to apply the
phenomenon of persistence of vision appropriately and obtain the required results.
According to Newton`s first law “the fixed body remains constant unless it is affected by
another object that changes its motion “. The brain and eye can interpret 10 to 12
separate images in a second. They can hold the image for 15 seconds, If there are set
of images one by one in this period of time, they will create an illusion of continuity.
The basic principle of this project is Persistence of Vision (POV) of the human eye. POV
mean when human eyes can see image in continue for short duration even after the
switching off the power and it gives stable state of display. Example of POV when we
are able to see the movie picture in cinema hall.
