Curious, using that signal amplifier module circuit does the green LED on the Relay module light up?

 

Curious, using that signal amplifier module circuit does the green LED on the Relay module light up?

Yes, now ,with no problems. Why "curious" ?

 

Doesn't make sense. With the last transistor in the signal amp a NPN transistor the relay should be ON when the #10 LED is OFF

 

Yes it is ON. I just checked now. This relay is driving the latching circuit

this sign is a "push button" sign from the relay wiring pad, that is hitting the contacts of the latching circuit. Very simple. It doesnt matter if is staying on or off all the time. It should be better to stay off all the time, but im happy as it is now as well.

 

Now you put me to think a little bit.
Maybe my original opto + darlington transistor module, if I would add the capacitor on the base of the transisntor, like I did here, maybe it will cut off the vibrations as it does in this circuit here.
- I think the key was that capacitor for the trembling problem.
Because that circuit was opening the relay only when pin10 was activated !
But the other problem with it was that I burned 2 transistors... and i have no idea why. Most probably some weird short somewhere.
this is the old circuit :

 

- I think the key was that capacitor for the trembling problem.

Correct.
Did you try a 100nf on pin5 of the LM3914?

 

not yet, but I will.
I just did the test on the wall just now.
And guess what ?
It works there as on my table !!!!
OHOHOAAA

 

The reason was it might filter out the fluctuations from the Sensing circuit.

 

Ok, so is mounted on the wall now and is working.
BUT... is working when the wires for the 220V are NOT connected.
If I connect the wires to 220V, the entire circuit just freezes to ON state for everything. Every led is lit.
Damn...
This stage I never being able to reach. This is the first time Im encountering this problem.
Here in the drawing I put a light bulb but in reality is the 220V switch on the wall.

Yes the mild steel shield is grounded, and the live wires are behind this shield, touching the wall.
My first thought is to shield those wires as well. What can you suggest?

 

What's up with Relay II circuit? You show 240VAC directly across the contacts.

 

What's up with Relay II circuit? You show 240VAC directly across the contacts.

Yes. When that relay closes, it will open the 220V light bulb in my room. That is the reason for this project.

 

OK but I'm saying it's not drawn out correctly on the schematic. Should be as below.

 

ok, i didnt think it too much i only suggest it.
Now, the real problem, those wires, how to shield them ?
Also, on this forum, is an electric forum section? (but not electronic like here)

 

Can you move the Relay II module further way from the rest of the circuits?

 

Can you move the Relay II module further way from the rest of the circuits?

Bravo, good idea, I had this idea myself as well and originally I planned to put the relay inside the round hole in my wall. But relay glued to the board.
I think I might be forced to do it now.
The problem is that will be close to the location of the sensing module. But on the other side of the board, entering in the hole of the switch in the wall.
Or... after further thinking,
to move the relay inside the hole, put 2 stiff pins that will connect to 220, and drag only the 5V for the relay into that hole. Making the relay like a plug. Hmmm. Not bad idea.

 

But im more interested in discovering the cause of that live wire perturbing my entire board , even if I have a grounded metal shield behind it.

 

Looking at your relay circuits you can eliminate Relay I and control the latch from the PC817 with a few modifications.

 

Looking at your relay circuits you can eliminate Relay I and control the latch from the PC817 with a few modifications.

Let me see what you got.
But be aware that I only need that wire to be shielded, or make it in a way that will not affect the board as it is now. That is the part that i am concentrated now. I am not concerned about switching at the moment. That part is solved.
I also jumped to an electrical forum and post this problem there as well. They give me the same answer with the relay in the switch socket as here. But not with shielding the wires.
So tell me straight. Those wires can not be shielded at all ? Or what is the issue? What is your wild guess the issue can be? You don't have to be right, just say your thoughts and I will compile the information and who knows maybe something will spark and be helpful. Some times it is. That's what I'm betting on.

 

A video update. Nothing is said there that we didnt discussed here. It's a test that failed.
Watch it if you wish.

 

Please help !
Another update, this time i made a very short video (2min) where I present the problem.
I inserted the 3'd relay inside the switch socket and I command it with 5V from the 2'd relay.
But the 2'd relay is vibrating like crazy when I power the board.