Weather Station#
Brief: to produce a weather station with at least two of the following measurements:
Wind speed, wind direction, temperature.
All inputs will be converted to voltages, using a 360 degree potentiometer for wind direction, a dc generator for wind speed, and LM35 type temperature sensors. The information must be displayed in separate fields on the 16 by 2 LCD.
More information to get you started on this project is provided here: Weather Station Demonstration.
Marks will be awarded as follows:
0 to 40%: For a non-functional unit which has some information on the LCD.
40 to 50%: For display of at least one of the measurements specified.
50 to 60% For display of at least two of the measurements specified and suitably formatted.
60 to 70%: For display of all three measurements.
70% plus: For additional functionality such as max and min values, extra displays such as a ring of eight LEDs to show wind direction using cardinal points.
Weather Station Demonstration#
Watch Dr. Davies explaining how to approach the Weather Station mini-project.
The video lasts 17 minutes.
Here is a sketch of the op-amp circuit.
And here are details of the LM324 op-amp and LM35 temperature sensor.
Here are some photos of the advanced demonstration programme running.
Note that the wind direction has been scaled to give a number 0 to 359 instead of 0 to 1023.
In this photo, the “raw” temperature data has been scaled to give degrees Celsius.
Here is a listing of the basic programme, which presents the “raw” data 0 to 1023.