Hall effect stuff

I 'recovered' these hall effect devices from the motors of 5-1/4" floppy disk drives (the half height, brushless motor kind) Here's what the little fellows look like:

A note that the depression on one side is used to sort out which side is which






By means of some reverse engineering I was able to deternime that a ~10mA current is passed through pins 2 and 4 (2 being the negitive end) from there I was able to use an op-amp to recover a signal, thusly:


The output of that could be fed into a 74XX14 (schmitt inverter) to clean it up a little. have fun with it!!






There are no spelling erors in this, my room is declared as a seperete country in wich the rules of spelling are difrent. I don't take responceability for you getting in trouble for taking apart other peoples computers for partz. I do make mistakes, and if there is one in a schematic i have provided you have my permission to write me a mean letter.


Back, need more be said?

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Rue Mohr, Member of planet earth (currently)