1. Weather Station Weather station design for measuring
weather parameters wind speed
temperature and humidity

2. Weather Station Team
Imad Rabayaa
Abdulmjeed Safa
Dr.Imad Braik

3. Outline Definition problem . Layout of the design.
( practical & technical ) constraints of weather station design.
Using hardware to measure weather parameters.
Implementing software solutions to the problem.
practical tests .

4. Definition problem

5. Layout of the Design Block diagram Sensors Sensors Tx Rx PACK BASEPC
LCD

6. Working together
The layout of this product will offer hardware solutions that integrate with the power of the PC. PC
Pack
2.4 GHZ
Base
RS 232

7. Practical Constraints
Type
Description
Economic
The cost to build will be 500$ approximately .
Environmental
The weather station will be able to operate in temperatures from -30°C to 60°C.
The weather station will be constructed with environmentally friendly products.
Sustainability
Outdoor pack will be able to withstand outside conditions, with minimal maintenance.

8. Technical Constraints
Name
Description
Transmission Distance (Pack to Base)
The distance will be 100 meters indoor.
Communication Protocol
(Base to PC)
The weather station’s base will communicate with PC serially .
Radio Frequency
Transmission frequency will be 2.4 GHZ.
Memory Requirements
The base microcontroller will have enough memory to store 12 hours of data.

9. Hard ware Common hardware components . - Micro controller .
- Humidity sensor.
- Temperature sensor .
Base hardware components .
- LCD .
- Wireless (Rx) .
Pack hardware components .
- Anemometer sensor.
- Wireless (Tx) .
LCD :Liquid Crystal Display

10. Common hardware components
Micro controller ( PIC 16f877 )
10-bit ADC module.
Timers .
SSP .
USART .
CCP.

11. Common hardware components
Humidity Sensor
There are several devices used to measure relative humidity.
A stable design using hygrometer HS1101 with a TLC-555 timer .
RH = 565.1− f
RH : Relative Humidity

12. Humidity Circuit

13. Humidity Sensor (output)
RH = 50%
RH = 91%

14. Common hardware components
Temperature Sensor
ICTS LM35 used in the design .
It has an output voltage
that is proportional to the
Celsius temperature.
Temperature (oC) = 5 * Vout * 100 / (oC /V) .
ICTS : Integrated Circuit Temperature Sensor

15. Temperature sensor Circuit

16. Temperature Sensor (output)@
Input voltage 5v
Temperature : 22 oC

17. Pack hardware components
Anemometer
The basic cause of wind can be attributed to variation in temperature.
Starting speed 0.3 m/s.
Electrical output 3….1042 HZ .
Power Consumption 0.3….1.2 mA.

18. Anemometer (output)
Wind Speed : 2.7 m/s
WS : Wind Speed

19. Pack hardware components
Power supply
The power supply for the pack needs to be as efficient as possible .
Since the pack is powered
from batteries, it will not require
any rectification .

20. Hardware components Wireless XBee Transmitter & Receiver.
1- High Performance.
2- Low Power.
3- Advanced and
Networking Security.
4- bidirectional transmission.
5- 10 bit ADC.

21. Base hardware components
Power supply
The power supply for the base
needs to be accurate enough for the microcontroller to function properly .
LCD
2 X 16 character matrix .
On-board controller .
Backlit display .

22. software

23. Applications

24. Difficulties pressure sensor is difficult to obtain.
Fault tolerance and nature of sensors adds complexity to hardware and software .
wireless.
Low output frequency of the anemometer .

25. Conclusion & recommendation
Hardware and software are integrated to solve the problem.
Parallel implementation of designed components allows problems to surface early in the process.less
wireless system used in the station is professional for long distances without data losses .
system is ready to be used by another students to complete building a whole weather station .

26. THANK YOU
Questions?