I am new to designing circuits but I have spent a lot of time researching for this project. I have been designing an automated indoor garden for my home. To save space, there will be 3 gardens stacked vertically. The gardens will be self watering using moisture sensors, a pump and solenoid valves. It will also have blue and red LEDs to provide light to the plants.
Here is the link to a google doc of my project for more details: https://docs.google.com/document/d/1jLP35pS16meeRFSbU6V1jtvDDfdHTNM6jPjyyabYSCg/edit?usp=sharing
I have made my circuit using an electronic circuit simulator I found online. Here is the link to it:
As you can see, I am using 1 pump, 3 solenoid valves (indicated by the green light), 15 blue LEDs, 27 red LEDs, and a laptop charger as the power supply(20V, 4.5A). To control the pump and valves, I am using transistors and an Arduino UNO.
The idea is that the moisture sensors will detect when each level of the garden needs to be watered. When a level of the garden is too dry, the Arduino will send power to the pump to turn it on. The Arduino will also send power to a specific valve to allow water to flow to that level of the garden.
So the question is, can anyone see any problems with the circuit before I actually build it? I am pretty new to electronics so I am worried I am going to damage some of my components.
A more specific question I had was, am I representing my pump correctly in the simulation? I have used a resistor to represent it. Should I be using a diode like I did for my valves?
Please let me know if I need to provide more information. Any feed back I receive will be greatly appreciated! :)
Thank you for all your wonderful suggestions! :) I have used your suggestions to change a few things. I am splitting the watering and lighting portions up into 2 separate circuits, each with their own power source. The watering side will be using a 12V power source, while the LEDs will have a 20V power source. Using separate power supplies also gives me the option to add additional levels to my garden in the future since I no longer have to worry about going over my power supply current rating.
Here is the link to the updated simulation of the watering circuit
I am going to wait until my LEDs arrive in the mail before I design my circuit for them. Since they are from china, I want to test them to see what their specifications actually are. I am also looking into current regulators for them.