Dear my friends Is it possible to connecting 7 SR04 to APM2.8? if it's possible please let me know how can I do that? thanks for your answers

dear my friendsIs it possible to use only one Hall sensor to determine the position of rotor in BLDC? I thought that maybe it's possible to count the magnets by only one Hall sensor and switching the mosfets. For example we have a 12 poles rotor…

dear my friendsI have a quadcopter and when I disarm motors one of them stop faster than others. I think there is a mechanical problem with it. Am I right? please help me. I truely appreciate it.thank you so much. 

Hi my friendsI have a quadcopter with APM.System works without problem, arm and disarm perfectly.Calibration OK, ENGINES TURN.Connect and disconnect battery and ESC sounds uncalibrated, not save settings.What's problem with that?Can not save the…