crystalyte 12v for hall sensor

[solarbbq2003]

Just wondering if anyone can go over the 12v power source crystalyte controllers use for motor hall sensors?
I think from memory "the7" had mentioned it drops down to 7v somehow?
Reason i'm asking is aprilia enjoy uses 12v for its torque and pedal first sensors ( both having hall sensors), I'm wondering if a controller with 5v source will be able to power the aprilia sensors ( I dont have an aprilia someone has asked me about it).

[fechter]

The hall sensors on a Crystalyte are powered from the 12v regulator through a resistor. I forget the value of the resistor. When the hall sensors are connected, the voltage drops across the resistor. The motor halls in a Crystalyte motor are really hall switches, so the output is either high or low, no inbetween.

Most hall sensors are 'ratiometric', which means the output will be a percentage of the supply voltage over a fairly wide range. My guess is they will work at 5v, but it will be hard to know without testing. At 5v there is no real risk of blowing up the sensors. Running a 5v sensor off 12v could blow something.

If the actual hall sensors are visible somewhere, you could read the numbers off it and look up the specs.

[The7]

The hall sensors on a Crystalyte are powered from the 12v regulator through a resistor. I forget the value of the resistor. When the hall sensors are connected, the voltage drops across the resistor. The motor halls in a Crystalyte motor are really hall switches, so the output is either high or low, no inbetween.

Most hall sensors are 'ratiometric', which means the output will be a percentage of the supply voltage over a fairly wide range. My guess is they will work at 5v, but it will be hard to know without testing. At 5v there is no real risk of blowing up the sensors. Running a 5v sensor off 12v could blow something.

If the actual hall sensors are visible somewhere, you could read the numbers off it and look up the specs.

The value of the resistor is 470 ohm. It will read about 13V when not-connected to the motor and about 7V when connected.

[solarbbq2003]

thanks guys, top notch