1. Moisture sensor. It measures moisture from conductivity. Conductivity means that 

how much electricity can go through it.

- Build and test this with this code:

- Test which materials work same way than your hand (Conductors). 
- Make a code that recognise only your hand.
 

2. Sound sensor

- Build same system and make a code.



- Test what is good light level


3. Temperature sensor

- Build this system and make a code



- Find a good têmperature that fan will turn on when it is too hot for you.

4. Distance sensor

- Make a car that drives by itself.