Hi,Post#31 and we still have no schematic or PCB pattern.If we had them when asked, the cap to the signal line would have been picked up long ago. Please some diagrams....Thanks.. Tom..
Hi, problem was my power supplies. I have changed them. Problem is mostly gone. I havent set all 4 power supply to same voltage by their pot but they are parallel connectable mean well brand 12 V 29 A power supplys. Do I need to set each of their voltages to the same or approximate values ? Can this be the cause of a little parasitic behavior "not setting them all to the same voltace "
Hi, what do you mean "parallel connectable" ?Please at least a power supply connection diagram!!! PLEASE.....Tom..
I can connect all V+ outputs of power supplies together and do the same for V-. I can do better, brand is meanwell and model is LRS-350-12KO Check out the link below.https://www.power-supplies-australia.com.au/blog/connecting-mean-well-power-supplies-parallel
Every 5 of them connected to a 40 A 12 V switching power supply
You told us this;Your powersupply is not included in the list of current sharing SWMP that the link supplies!!!!!!You do not connect all the V+ together, the gnds YES, but NOT the V+.You connect the V+ to groups of your boards.As in;The sharing diagram there will not work unless you have them ALL exactly the same voltage, not possible.As they do not monitor each others current, they cannot evenly share current.The noise could quite easily be the supplies interacting with each other.Please at least a power supply connection diagram!!! PLEASE.....Tom.. PS. Are aware that if you supplied the schematics we requested 7 DAYS and over 30 posts ago, your problem could have been solved.
Your powersupply is not included in the list of current sharing SWMP that the link supplies!!!!!!
Hi,What don't you understand with this statement?Don't just copy and paste!!Please read..Also, why don't you have a fuse on each of your PCBs?Tom... PS Please at least a power supply connection diagram!!! An image of your PCB pattern and a schematic will help!!!!!!!
Problem is mostly gone.
So you're worse off now than when you started!!A persistent fault is far preferable to an intermittent issue.But what would we know?, your project is too complicated for us to follow the schematics.(( I wasn't gong to follow, but I saw the thread is still alive!Tom, you're a hero. ))
I want to share the connection diagram but its too complicated to understand from pictures and I didnt use wires to connect the components, I used NETs to do it. So I will send pics of pcb instead