I've found it out!!
My hall effect sensors WEREN'T FULLY SOLDERED
I'm a little ashamed I didn't notice this earlier but whatever.
My hall effect sensor should look like this:
Instead, mine looks like this:
Notice how the middle pin of the sensor has just been lazily wrapped around the sensor.
After "unfolding" the sensor
But that's not all, the actual sensor bit in the amazon product images is a different component from what I've bought
(Similar sensor to the one on the amazon page)
Notice how mine is a semicircle while the one on the amazon page is like a trapezoid. The semicircle sensor that I have is labeled with:
I haven't been able to find a sensor matching this description yet.
I haven't seen the "semicircle" sensor that I have used in any KY-024 images online. It probably doesn't matter, just something to note.
Okay, no big deal, just unsolder and re-solder right? Well I don't have a solder station but I probably should buy one given how cheap they can get. I'm wondering if I can just cut the two soldered wires of the sensor, then one-by-one, hot glue the 3 pins to the correct spots on the PCB? Okay, that sounds like a hobby electronics sin but would it be possible? This is my first ever electronics project and if I ever do a second one I'll be sure to buy a soldering kit.
I should probably buy a soldering kit, but if the hot glue idea isn't catastrophically horrible I'd like to know if its a feasible option.
Now for the soldering part,
This is an image I found for the pinout of a similar sensor (the trapezoid one I mentioned earlier)
I've found that label 1 in this image is 5v, and label 2 is ground label 3 is where the other pin is supposed to go based on product images. My question is, should I just put the extra pin in hole 3 or should I cut the wires and move pin 2 to hole 3 and move the middle pin to where pin 2 was?
All four of my hall sensors arrived like this, any ideas what I should do?
I've also found this image, which is useful:
I can then infer that in order from left to right, the pins on the KY-024 are +5V, Ground, Output
So now we just have to find out which pins are which in this semicircular, unknown sensor component.
I have found the semicircle KY-024 here: https://www.aliexpress.com/i/33002918195.html, there appears to be no useful info though
I have now found what appears to be the sensor itself here: https://www.aliexpress.com/i/32991007776.html
From the product description, it appears to just be a transistor. I hope I wasn't scammed. The transistor linked above is sold by the same company who sold the KY-024 with the ksp13 semicircle soldered to it.
I have also found the "KSP13 JO8", the exact same transistor that was soldered to my KY-024
The Alibaba listing for the KSP13 transistor:
The "sensor" that was soldered to my KSP-024
I think I might've been scammed, and "Gump's grocery" on amazon just soldered a transistor to my KY-024 instead of an actual hall-effect sensor.