Help needed 4ch relay, least power/price

Hello all,

I am working on an automated hydroponics system. The main goal of this project is to build a cheapest automated with least power consumption hydroponics.

Things want to achieve:
Have 4 12v with <1 amp devices like water pump, air pump, soloide valve and one reserved. At any given point only one device will be in use. (Maybe one by one with some delay) multiple devices will never run at the same time.
For example: In 24hrs each device will be powered (let’s say) for 2hrs.

Things I have:
Arduino Uno
4 channel relay
12v 1 amp power supply
5v power supply
4 12v <1 amp devices( as mentioned above)

Question:
Can I connect all above using a single 12v power supply? Is is good and reliable solution? If both yes then, can anyone share a circuit diagram. If no, then please suggest some other solution.

I am ready to buy any components buy the output of project must be cheap, reliable with least power consumption.

areyyaar:
Can I connect all above using a single 12v power supply?

If it has a sufficient output current, yes. You should ensure your power supply can provide at least twice the maximum current that the project will need so as to ensure the power supply is never overloaded.

...R

Thanks for the reply, in mean time I will share a circuit diagram and if possible look into it and correct it if wrong.

If I understand this statement correctly :" The main goal of this project is to build a cheapest automated with least power consumption hydroponics." You also want the most prone to failure system you can build. IS that correct?

Paul