Solar Powered Automatic Rain Operated Wiper
ABSTRACT:
Solar panels (arrays of photovoltaic cells) make use of renewable energy from the sun,
and are a clean and environmentally sound means of collecting solar energy. The Solar Cooling
Fan Caps are specially designed for summer tourists as well as fishing and climbing mountains,
playing golf, sport meeting, people working outdoors and children. It’s good for preventing
sunstroke and lowering the temperature and they make great gifts. The solar cell can transfer
solar energy directly into electric power which can turn on the fan. Its fanning can change
automatically depending on the availability of sunlight.
In this project Solar panel of 12V is used and a rechargeable battery is provided to store the
energy. An ON /OFF switch is provided for user controlled operation. The uniqueness of this
project is, the cap can sense the intensity of the sun light temperature and automatically switches
on the cooling fan without user’s interference.
An ON /OFF switch is provided for user controlled operation. The uniqueness of this
project is, the fan can sense the intensity of the sun light temperature and automatically switches
on the cooling fan without user’s interference. Here we are use LM35 sensor ,whenever
temperature is high the fan is TURN ON, temperature is low the fan is TURN OFF.
When LDR2 receives more light than LDR1, it offers lower resistance than LDR1,
providing a high input to comparators A1 and A2 at pins 4 and 7, respectively. As a result,
output pin 1 of comparator A2 goes high to rotate motor M1 in one direction (say, anticlockwise) and turn the Solar panel.
When LDR1 receives more light than LDR2, it offers lower resistance than LDR2, giving
a low input to comparators A1 and A2 at pins 4 and 7, respectively. As the voltage at pin 5 of
comparator A1 is now higher than the voltage at its pin 4, its output pin 2 goes high. As a result,
motor M1 rotates in the opposite direction (say, clock-wise) and the solar panel turns.
For Details Contact: A.VINAY-9030333433, 0877-2261612
BLOCK DIAGRAM:
SOLAR
PANNEL
RECHARGEABL
E BATTERY
POWER
SUPPLY
Rain sensor
RELAY
wiper
POWER SUPPLY
POWER SUPPLY:
STEP DOWN
BRIDGE
FILTER
TRANSFORMER
CIRCUIT
CIRCUIT
REGULATOR
For Details Contact: A.VINAY-9030333433, 0877-2261612
This project uses regulated 5V, 750mA power supply. 7805 three terminal voltage
regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac
output of secondary of 230/09V step down transformer.
ADVANTAGES:
 Fit and Forget system
 Low cost and reliable circuit
 Automatic operation
 Man power is completely reduced.
 Save the power
APPLICATIONS:
 Industrial areas
 Used in homes, colleges etc.
For Details Contact: A.VINAY-9030333433, 0877-2261612