Try connecting the negative side of the push button through a 330 ohm resistor to the power supply negative on the 3 volt supply only.
Leave the 3 volt supply negative connected to the 3 volt relay module only.
Edited post #35 to show below mod.

View attachment 298496

Thank you. I'll try this and let you know.

 

If that works without causing problems with the smart doorbell then remove the resistor and try connecting the negative of the button directly to the negative of the 3 volt supply.

 

I have a circuit that can eliminate the 3 volt supply and 3 volt relay module if the previous suggestion works. It uses the 5 volt supply and relay module with two additional transistors.

 

I have a circuit that can eliminate the 3 volt supply and 3 volt relay module if the previous suggestion works. It uses the 5 volt supply and relay module with two additional transistors.

That’s interesting. Could you please share it with me?

Thanks.

 

I will but have you confirmed there is no issue connecting the negative of the smart button to the power supply ground?
I don't anticipate one but one never knows until tested.

 

I will but have you confirmed there is no issue connecting the negative of the smart button to the power supply ground?
I don't anticipate one but one never knows until tested.

Ok. I’m waiting for the 2n7000 to be delivered. Probably it’ll be delivered today or tomorrow. I’ll let you know how it works.
Thanks

 

Ok. I’m waiting for the 2n7000 to be delivered.

Don't need the 2N7000 to test my proposal. Just connect the 330 ohm resistor from the negative side of the video doorbell button to the negative of the 3 volt supply and see if the video doorbell still works OK.

 

Don't need the 2N7000 to test my proposal. Just connect the 330 ohm resistor from the negative side of the video doorbell button to the negative of the 3 volt supply and see if the video doorbell still works OK.

Understood. I'll test it and let you today evening.
Thanks

 

Don't need the 2N7000 to test my proposal. Just connect the 330 ohm resistor from the negative side of the video doorbell button to the negative of the 3 volt supply and see if the video doorbell still works OK.

Yes through 330 ohm resistor, once I connect the negative side of the doorbell with the negative wire of the 3v DC supply, doorbell works fine.

 

Just to be clear the 3 volt supply was ON
correct?

 

Just to be clear the 3 volt supply was ON
correct?

yes of course

 

OK just checking. Do you have a multimeter?

 

OK just checking. Do you have a multimeter?

Yes

 

Set the meter to read DC current at 200ma or so and connect the meter leads directly across the video doorbell button wires so it activates. I need to know how much current it draws.

 

Set the meter to read DC current at 200ma or so and connect the meter leads directly across the video doorbell button wires so it activates. I need to know how much current it draws.

For 200mA it gave me nothing. But when I set to 2000microA setting it gave me 30.

 

For 200mA it gave me nothing. But when I set to 2000microA setting it gave me 30.

sorry. It’s 32.
see the photos

 

Excellent, one more test. Try connecting the negative side of the doorbell wire directly to the negative of the 3 volt supply without the resistor and test doorbell button again.

 

Excellent, one more test. Try connecting the negative side of the doorbell wire directly to the negative of the 3 volt supply without the resistor and test doorbell button again.

Button Works perfectly even after connecting negative wire of the doorbell switch directly connected with the negative side of the 3v power supply. (That power supply is switched on )

 

Try this circuit with the 2N7000.
When the button is pressed for the 230 volt bell the opto-isolator turns on Q2 which shorts the switch wires on the video doorbell which in turns activates the 5 volt relay module to power the 230 volt doorbell.

 

Try this circuit with the 2N7000.
When the button is pressed for the 230 volt bell the opto-isolator turns on Q2 which shorts the switch wires on the video doorbell which in turns activates the 5 volt relay module to power the 230 volt doorbell.
View attachment 298675

Thank you. I’ll test it and let you know tomorrow. I’ll have another 2n7000 tomorrow.
Cheers!