Challenge @ Boston Propeller Expo! Bring your scope & parts! Win a Handful of Motors!
vanmunch
Posts: 568
The challenge is straight forward. To measure and reproduce the single used to control/power a Ladybird quadcopter with a propeller chip. I have the quadcopter and you can see what Ive done before on this thread. I think I was close, but the motor didnt seem to be as powerful while I was controlling it.
http://forums.parallax.com/showthread.php/153465-PWM-Motor-control-Mystery-for-those-micro-quadcopters-What-am-I-missing
http://forums.parallax.com/showthread.php/153521-Help-Understanding-transistor-output-(TIP120-TIP31)-why-doesn%E2%80%99t-it-allow-max-V
So
1) Determine the PWM frequency generated by the Ladybird and sent to the motors
2) Figure out what chip/transitor/MOSFET/ect. to use and demonstrate controlling the motor with a propeller chip the same way (max voltage, PWM/ wave form) as the Ladybirds control board. (Roughly the same amount of lift)
Ill bring the partially hacked quadcopter Friday night and Saturday, but I would be disappointed if the challenge was completed Friday night or Saturday morning. Ill bring a bunch of different transistors and MOSFETs, but I've never been able to find one that let all of the voltage through like the one the quadcopter uses.
Let the battle begin!
Dave
http://forums.parallax.com/showthread.php/153465-PWM-Motor-control-Mystery-for-those-micro-quadcopters-What-am-I-missing
http://forums.parallax.com/showthread.php/153521-Help-Understanding-transistor-output-(TIP120-TIP31)-why-doesn%E2%80%99t-it-allow-max-V
So
1) Determine the PWM frequency generated by the Ladybird and sent to the motors
2) Figure out what chip/transitor/MOSFET/ect. to use and demonstrate controlling the motor with a propeller chip the same way (max voltage, PWM/ wave form) as the Ladybirds control board. (Roughly the same amount of lift)
Ill bring the partially hacked quadcopter Friday night and Saturday, but I would be disappointed if the challenge was completed Friday night or Saturday morning. Ill bring a bunch of different transistors and MOSFETs, but I've never been able to find one that let all of the voltage through like the one the quadcopter uses.
Let the battle begin!
Dave
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