User Interface
Description:
The user interface (Fig. 1) contains a mixture of
displays and controls which will allow the user to monitor and operate
the system. The display system will include 2 liquid crystal displays
(LCDs) and 8 light Emitting Diodes (LEDs). One LCD will give the
reading for the voltage of the selected output and the other will give
the current for the same selected output.. One LED will operate in
conjuction with each LCD to indicate if the reading being displayed is
over the maximum limit. These LCD-LED combinations will allow the
user to monitor each of the following subsystems: solar power, wind power,
battery power, and load consumption. Four of the remaining six LEDs
are used to indicate which reading is being shown. One LED is placed
adjacent to each of the four listed outputs that are to be monitored. Only
one output will be capable of being monitored at any one time and the corresponding
LED for that output will be lit as long as that quantity is displayed.
The two remaining LEDs at the bottom of the interface indicate to the user
if the system is running on solar and wind power or battery power.
The control mechanisms for this system are six push
buttons. The first push button is a system reset, its function is
to allow the user to reset the system in the event that the system shuts
down due to a overvoltage or overcurrent situation. The second push
button is a so called panic button which allows the operator to shut down
the system manually in the event that the system does not go into automatic
shut down as a result of overvoltage or overcurrent in the system. The
last four push buttons sit adjacent to the LEDs for each of the outputs.
Depressing the push button will change the display readings to the appropriate
voltage and current readings for that selected output.
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