AUTOMATIC WINDOW

CONTROLLER

JOEL MUMINAJOEL MUMINA

EASA/AVI/2109/12EASA/AVI/2109/12Mumina's Design

IntroductionIntroduction

•In our daily life, we interact with windows to get some fresh air, but most of us are not able to adjust our windows when we are not around the windows. •And when windows are open, they could allow rain into our houses and offices.

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BackgroundBackground

• Early this year my brother had travelled out of the country for a month, when he came back he found rain water had entered his house and most of his valuables had started decaying.

• This couldn’t have happened if there was a way to close his windows automatically when it rained, hence the need for automatic window controller.

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Problem statementProblem statement

• Our homes and offices are fitted with windows, which if not closed at the right time may allow rain causing damage to property. Examples of damage caused by rain are:

a) It destroys valuable electronics which are not water proof.

b) It causes decay of valuable furniture

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Figure showing Property destroyed by rain water

ObjectivesObjectives

• Imagine waking up every day without worrying about damage of property by rain because your windows were not closed in time. The project aims at designing an efficient and effective Automatic window controller which:

1) Opens and closes windows after an interval of 12 hrs.

2) Closes window in case of rain to prevent damage of property.

3) Works in a wide range of temperatures

4) Effective and efficient product at a minimal cost.

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MethodologyMethodology• This selected design had different parts which worked

together to meet the objectives. These parts are: power supply,LM393 moisture sensor, arduino Uno ,software and micro servo motor MG90S.

• The selected design will be powered by a 9V, 1000mA power supply which will be connected to arduino Uno board. Other components of the selected design will draw their power from 3.3V and 5V power pins of the arduino.

• The arduino Uno will be using software created by arduino IDE to signal micro servo MG90S to go different positions, which result to opening and closing of window.

• The LM393 moisture sensor will be connected to arduino Uno. It will be continuously sending an analog values( 0 – 1023) to arduino Uno depending on environment . The arduino will use the analog value to determine the signal to send to micro servo motor.

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Complete circuit diagramComplete circuit diagram

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• In case of rain the sensor will send a signal to arduino Uno, the arduino will

respond by sending a signal to servo motor causing the window to close.

Circuit operationCircuit operation• When the automatic window controller is switched on the

microcontroller sends signal to the servo motor to go to 180 degree position, thereby opening the window. The servo stays at the 180 degree position for 12 hours.

• After the 12 hours the microcontroller sends signal to the servo motor to go to 0 degrees position, thereby closing the window. The microcontroller sends the signals causing the movement of servo at an interval of 12 hours.

• In case of rain while the micro servo is at 180 degree position, the sensor value decreases to below 500. In response, the microcontroller sends signal to micro servo to go to 0 degree position, thereby closing the window. And when the rain stops, the sensor value increases to above 1000. In response microcontroller returns to normal operation

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Test resultsTest results

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No. Test point Expected Measured

1 Input voltage to arduino 9V 9V

2 Arduino's 3.3V pin voltage 3.3V 3.2V

3 Arduino's 5V pin voltage 5V 4.98V

4 Sensor output value 0 - 1023 0 -1023

5 Servo motor Positions 0 - 180 degrees

0 - 180

degrees

ConclusionConclusion

• Over the given period the main objective of the project has being achieved, which was to create an automatic window controller that closes the window when it rains and also is responsive to time control.

• The chosen design, after it was implemented, performed as expected after testing its control

• The automatic window controller can be used in office windows, home windows or even vehicle windows to

prevent damage to valuable items when it rains.

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RecommendationRecommendation

• For better performance, a more powerful servomotor is recommended. This will also ensure smooth operation for large windows.

• It is also recommended to check the extent to which your window can go to prevent breakage of windows. Example if it is 60 degrees ensure your open angle is 60 and not 180.

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Thank you for

your attention

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