I’m trying to figure out the speed of rotation of a wheel using a Hall Effect sensor. Here is what I know:
I have 3 magnets spaced evenly on the wheel (71mm apart around circumference of wheel)
The hall effect sensor is working and counting (tested)
Their are 1,609,344 mm in a mile
1000 ms in a second (everyone knows that)
I just can’t seem to figure out the formula…
I have arduino counting each time it senses a magnet and incrementing each time a magnet passes. So I know the hardware is correct.
all I need to figure out, which I’m having trouble with, is the formula to calculate mph based on magnet spacing, etc… [smiley=undecided.gif]