Hello guys I am facing a problem that is we are getting some unexpected voltage reading on routes below the neutral path(NU_OUT) especially those connected to transistors Q6 ,2,4,5. Actually those signals should be controllable from external microcontroller even though I didn't connect to any microcontroller and just powering up the board we are seeing those Voltage reading. We think it's due to neutral wire above those paths.please can anyone help me out to find the actual reason for the cause of the problem and solve it .Thanks in advance

 

If they should be connected to the micro I/O pins but are not at the moment then connecting the micro pins might well reduce the pickup.

 

If they should be connected to the micro I/O pins but are not at the moment then connecting the micro pins might well reduce the pickup.

I was unable to operate those transistor when I connect I/O pins due to that unexpected voltage

 

Schematic please.

 

Stray capacitance.

Can you please provide some more Information or details regarding it

 

Schematic please.

Relay signals on left are from microcontroller

 

I don't see NU_OUT on your schematic.

If the NU_OUT line if floating, then it takes very little stray capacitance coupling to show a signal on a high impedance oscilloscope.
Add a 10kΩ resistor from that line to ground or V+, and see if that makes a difference.

 

I don't see NU_OUT on your schematic.

If the NU_OUT line if floating, then it takes very little stray capacitance coupling to show a signal on a high impedance oscilloscope.
Add a 10kΩ resistor from that line to ground or V+, and see if that makes a difference.

I didn't sent the full schematic.i shared only the operation of relays

 

Show the full schematic and the full PCB layout.
It appears to me that you need to separate the AC traces from the low voltage components.

 

I don't see NU_OUT on your schematic.

If the NU_OUT line if floating, then it takes very little stray capacitance coupling to show a signal on a high impedance oscilloscope.
Add a 10kΩ resistor from that line to ground or V+, and see if that makes a difference.

Can you please tell me the name of the net I have to add a pull up resistor according to schematic

 

Show the full schematic and the full PCB layout.
It appears to me that you need to separate the AC traces from the low voltage components.

I am sorry but I am not supposed to share full schematic

 

N

Someone is paying you for this?!?

No

 

Ha, ok. Another top-secret device.

Hahaha

 

How do you expect us to help if you can't give us compete information on what you are doing?