Sensors

The sensors are a very imporant part of our project.
There are many types of sensors, but we choose three:
-Temperature
-Light
-Humidity

Our temperature sensor is a LM35cz (TO-92 package). It measures the temperature and produces a linear voltage.

For the light measurements we use a simple small LDR. The value coming from the voltage divider (LDR - resistor) is linked to four states: "Nacht", "Avond/Zw bewolkt", "Dag/L bewolkt", "Dag/Zonnig"

The Humidity sensor wasn't easy to find.
We tested many of them, but they all had problems. Finally we decided to use a HIH-4000 from Honeywell. This sensor produces also a linear voltage, just like the LM35.

All of our sensors were tested on the breadboard, now we are waiting for our final "Sensorshield" print!