Note the transistor should be a 2N2222, not what you put in your diagram.
Sorry, I made a mistake in the diagram. I needed to control at least 3 AC LOADS so I have 3 SSR(s) that should be connected.
Here is the corrected diagram.
Any problems with this design? Should I still add a flyback diode across the SSR so that I can protect my transistor?
Note I might be controlling other AC loads with greater than 10A so I chose an SSR instead of the regular relay module with a 10A rating.
Thanks
Hi,
Can I suggest when you connect all this up, that you leave the mains disconnected and check that you can switch on the inputs of each of the SSRs.
Use a test code first to check the SSRs.
If you are switching loads up to 10A, have you worked out wire sizes to use on the mains side and to keep the mains wiring away from the other wiring?
This is for safety and to keep mains interference away from your control circuit.
What is your project?
What are you aiming to control?
Thanks.. Tom.. 
This is a school project that I am working.
The goal is to create a poor man's version of those "intelligent circuit breaker" in the market today wherein you could control the turning on or turning off of those circuit breakers by using
mobile app. Additionaly you can view the power, voltage, energy being drawn from this circuit
breakers by looking at the small LCD display.
I am developing a Flutter based Mobile Application and I wanted to control my AC Loads directly using the App.
At the same time, I wanted to learn the Energy, Power used for each SSR so that I could display
it on my Mobile Application and a small TFT display attached to my poor mans version of project.
I will add a little bit of AI and Machine Learning on the readings that I am getting from my
PZEM-004T so that we could draw some analytics on the power used.
Note:
I am no electrical/electronics engineer but a software developer student working on mobile/web applications.
I merely read on the internet and youtube for the Arduino programming and the workings on
electrical mains so I am asking for comments from experts here.
No - that end of the SSR is, internally, an LED and a resistor.
OK ?
Have you also found that minimizing the component count in a commercial product both lowers the cost and increases the reliability?
Did you ever answer these important questions?
And what is the load that may be greater than 10A?
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