Changing hall sensor on old Mac motor

[Joppo]

Hi. I'm changing the hall sensors after my wheel got loose and ripped everything from the PCB board. I got my hall sensors now and was gonna solder everything together without the PCB because it's to damaged to reuse.
Then I discovered thi yellow little fella, how does it work and how to connect everything? Someone got a diagram? Searched everywhere and didn't see something similar to this
It's a old Mac motor btw

 

[amberwolf]

Then I discovered thi yellow little fella, how does it work and how to connect everything?

That is a 0.1uF capacitor. Probably not polarized as no obvious marking visible, but you should check both sides of it for a marking that is only near one lead. If there is not, then it doesn't matter which one connects to power or ground.

For where it connects in your wiring, you need to follow the board traces ffrom it's leads to where your halls and/or hall wires connected. Then wire it to your new halls the same way.

Normally a capacitor would be used across the +V and ground for the parts it's meant to work with, as a "bypass cap", meant to filter out voltage variations and help the parts work better in noisy environments (like motors). But there are no guarantees that things are ever designed the way they typically are, so verifying this is always a good idea.


BTW, it may be simpler to still use the PCB to hold your halls, and just use short wires across the torn circuit traces. Hall leads are fragile, and you can break them off in the process of installing bare halls into a motor, and/or soldering the wires on, etc.

 

[Speedgeezer]

Not sure if this will help, its all I have at the moment. Its been almost ten years since I replaced one of mine.