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        Q: How can i control DC motor using Atmel Microcontroller?
A: YES , Alltrax makes various controllers for all sorts of carts ( ez-go , club automobile , yamaha & amp ; more ) either SERIES & amp ; REGEN BRAKING . Controller prices start about $ 299 relying on modelling . They 's the bestest for aftermarket controllers ( 2 year guarantee ) .   Andrew  ECCC 

Q: How to calculate rpm of BLDC motor shaft?
A: The link shows 8 various automobiles , 2 various sized and 4 various voltages . Which one ?   But in any event current depending on the mechanical loading . The referenced page has info on RPM versus torque and torque under different circumstances .   Once you are aware the current , split that into the amp-hour rating to get hours .   . 

Q: How do I calculate rpm of a BLDC motor?
A: None of this is feasible to done without much more info .   An AA ( alkaline ) can deliver 1 amp at 1 volt , scarcely , for several minutes .   But once you 've the speeding of the motor , putting a gear on the shaft wo n't change that speeding .   .