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kwreed · 11-12-2013, 07:27 PM

Anyone know what kind of a signal this puts out?

Is it one pulse per rev ? Perhaps with a 33% duty cycle ?

I'm thinking of connecting it to an Arduino to measure the heli's headspeed.

Comments ??

extrapilot · 11-12-2013, 08:00 PM

It is simple digital, one pulse per phase 0-cross. So motor RPM will depend on pole count. You dont need to worry about duty cycle- just capture rising or falling edge if the Arduino is capable of that (or do you have to use polling?). Do beware that the signal can be corrupted just as a function of how these motors work- so it will make sense to do a lot of averaging, etc.

11-12-2013, 07:27 PM	#1 (permalink)
kwreed Registered Users Join Date: Jun 2012	Hobbywing Brushless RPM Sensor Anyone know what kind of a signal this puts out? Is it one pulse per rev ? Perhaps with a 33% duty cycle ? I'm thinking of connecting it to an Arduino to measure the heli's headspeed. Comments ?? __________________ But,how do they build the smoke into it?

11-12-2013, 08:00 PM	#2 (permalink)
extrapilot Registered Users Join Date: Aug 2010	It is simple digital, one pulse per phase 0-cross. So motor RPM will depend on pole count. You dont need to worry about duty cycle- just capture rising or falling edge if the Arduino is capable of that (or do you have to use polling?). Do beware that the signal can be corrupted just as a function of how these motors work- so it will make sense to do a lot of averaging, etc. __________________ "The problem with quotes found on the internet is you have no way of confirming their authenticity." - Abraham Lincoln

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