Hi. I purchased a new 2000w BLDC 72v controller for my fat scooter and i'm hooking it up and all seems to work fine.
I have no real Speedometer on it, only a simple voltage display.
I was thinking to develop something using arduino but I don't really know what the single cable Speed signal works.
it looks to be directly soldered to one of the 3 phases.(or possibly one of the hall sensors)
So I'm guessing the Chinese dashboards does something like this: counts the time between 2 pulses (=one rotation of the wheel, since it is only monitoring one phase) then calculating the speed using time taken for one rotation, and the circumference of the Tire? getting something like xxxcm in 250ms (then converting that to km/h)
or am I way off?
I have no real Speedometer on it, only a simple voltage display.
I was thinking to develop something using arduino but I don't really know what the single cable Speed signal works.
it looks to be directly soldered to one of the 3 phases.(or possibly one of the hall sensors)
So I'm guessing the Chinese dashboards does something like this: counts the time between 2 pulses (=one rotation of the wheel, since it is only monitoring one phase) then calculating the speed using time taken for one rotation, and the circumference of the Tire? getting something like xxxcm in 250ms (then converting that to km/h)
or am I way off?