Hi, I am looking for some help please.
I have researched several automated greenhouse projects but have been unable to determine what parts I actually need.
I am a software developer by trade but have no knowledge of electrical components - this is where I am confused as to what parts are required.
What I would like to control via the arduino is:
LED grow light - mains connected
Fan - mains connected
DHT11 humidity / temp sensor
12v water pump
12v computer fan to cool arduino setup
The LED grow light will be turned off/on by a timed function in the arduino.
The DHT11 temp/humidity values will determine whether to turn on the mains connected Fan.
The 12v water pump will also be controlled via a timing function.
The computer fans will most likely be on all the time.
So, I have in mind what components I need to acquire, but really - not sure!
I’m thinking I will need a relay to operate the mains connected stuff - do I need resistors, transistors, etc.???
How do I determine what is needed?