The aluminum housing to the motor decided to let go of the screw hole for this PCB and the motor tried to chew it up. I’d like to be less wasteful and just replace what’s needed than fill a landfill with a giant 80v lawnmower for this. Last picture shows the other sides piece that broke off and went for a ride inside as it tried to grind it
Can someone help me identify who makes this please and/or maybe give an alternative hall sensor for an 82v/80v hall sensor for a lawnmower. Thanks
Welcome to the forum.
That appears to be a PCB assembly for three hall sensors with their filter capacitors and pull up resistors. (IC, R & C : 1, 2 & 3)
Most likely it’s a proprietary design from the motor manufacturer. If the manufacturer does not sell this 2016 assembly, your only option may be salvaging a working assembly from another of the same model lawnmower, maybe the whole motor.
The PCB looks repairable (at least it would be easy for me) but, without the manufacturers schematic for the circuit it may be very difficult to figure out the values for the nine components.
Knowing the make and model of this lawnmower or motor may help locate more information.
Hey, thanks for a response and so fast. Not something I’m used to at all 
This is technically from a kobalt 80v self paced mower made by greenworks and I’ve went around to many brands comparing and they all seem to be from Globe. I did some more digging and this kid seems to hold almost all battery powered things on a monopoly, pretty amazing.
Wow so the board is still useable all scratched up like this still?
I love learning and have been trying to learn about this hall effect sensor because it’s used in so many places I’m figuring out at 38 years old.
9inputs? I also noticed that all the magnets around it are all the same polarity , not one that’s opposite. So the 8 magnets have 3 hall effect sensors , probably wrapped up in the wiring around the coils (why I don’t see them on this underneath or on top of the board as IC sticking out?
Assuming they are mounted in a triangle pattern around the circle and sense when 2 magnets pass and then send power to either a b or c coils . If b was just energized and next location assuming spinning clockwork is c then next but depending on pull and a few other things I’d imagine.
I’m getting sidetracked.
There isn’t a way to pull info from this PCB, even if it’s 0 and 1 and convert it from binary to hex and read it or even just copy the binary and move it to another PCB…if I can make PCB that looks like this? If I cannot find this PCB separate ? I think it only comes inside the motor.
I also read that my motor being banged up is bad too. It will make it wobble and bring it to its death eventually. It looks like it didn’t cut any of the stator so I’ll keep that piece at least with the hall sensors somewhere attached to it. Trying a 3rd time to buy this motor separately.
Any chance you can give me the quick and simple explanation of how those 9 sensors would work generally and just touch on what details would be missing based off manufacturer info that is have to code if I did build a PCB . Thanks. Not sure this is the best first project with PCB hah
Ref. the first photo.
The parts have all been ripped off the PCB during the failure.
The PCB had three hall sensors, they were located at the three lead patterns (SOT-23-3) labeled IC1, IC2 & IC3. (the printing of IC1 was scraped off in the failure)
Most hall sensors require one resistor and one capacitor placed close to the IC package.
On this assembly they are labeled to match the associated hall effect IC (e.g R1 & C1 are for IC1)
Most likely the normal operation is that each hall sensor switches as one of the magnets passes by creating a pulse read by the motor control PCB.
Would need either the schematic diagram with full component specifications or, pictures of a PCB with the parts intact to see the part markings, to figure out which hall sensors, resistors and capacitors are needed (there are a lot of possible combinations).
Thanks for your help Paul! Seconding that, a full schematic might not be available but any documentation you could find for the board might help us sus out some of the specifications.
