This
sundial, as it is self indicative is a combination of audio
and visual type. Its construction comprises mainly of the base-structure
and electronic components. The principle of operation is that
a series of twelve LDRs (Light Dependent Resistor) is placed
on an arc. The rays of the sun strike these LDRs at fixed equal
intervals of time throughout the day. Nine picture tubes (CRT)
are arranged in a matrix format which serves as a one large
screen. Sets of speakers are present on both sides of the screen.
Power to these picture tubes is sourced from three solar panels
placed above the screen.
This
comprises a system on one side of the arc. The same can appear
on the opposite side also. Whenever sunrays strike a particular
LDR, it triggers the audio-visual system "ON" , featuring a
small documentary pertaining to the position of the LDR, corresponding
to that time of the day. For e.g. if the LDR on the sunrise
side is activated, the feature may show gentle chirping of birds
with light-music tones. This type of sundial should be located
in a garden or in some other similar public place.
