Can they be replaced with better quality?Ok, I just made some tests. For one, it wasn't the soldering. However, the issue is the defective small six pin SOT buck switchers that @RCinFLA mentioned as well. Cold spray them gets the BMS into a boot loop; I also momentarily managed to get it to behave and the 'buzzing' the BMS induces (on the BMS and in the power supply charging it) goes away.
I'll see if I can find the replacement part mentioned somewhere, and replace those.
Can they be replaced with better quality?
It would be great if you could supply the better quality replacement part#'s. Been a while since I ordered anything from Mouser.As far as I can remember, yes, the replacements are better - or at least, the correct ones. This is all from memory, I need to look up the details...
It would be great if you could supply the better quality replacement part#'s. Been a while since I ordered anything from Mouser.
Well, my 64-year-old ears could never hear anything, until the BMS went into alarm mode.There definitely is a high pitched sound, and I'm 99% sure it has to do with those same DC-DC converter chips. I'm currently trying to get the exact specifications of the chips in questions and waiting for someone to get back to me. If I can't get those, I'll just do the measurements on the circuit in isolation and figure out if there is a drop-in replacement I can find (should be).
I've held off ordering one of these to replace my Daly BMS.There definitely is a high pitched sound, and I'm 99% sure it has to do with those same DC-DC converter chips. I'm currently trying to get the exact specifications of the chips in questions and waiting for someone to get back to me. If I can't get those, I'll just do the measurements on the circuit in isolation and figure out if there is a drop-in replacement I can find (should be).
There are some android apps that allow generating sound at different frequencies.I have tried. Young people are much much more sensitive to high frequencies. They hear hf sound from large distance even when I don't hear feel anything .Well, my 64-year-old ears could never hear anything, until the BMS went into alarm mode.