In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

Daniel,
  That method would be very ineffecient.
  You want to use PWM to control the speed of the motors.
  Of course you will need a high power transistor or FET to interface to the motors.
  Note that the PWM commands in SX/B are meant for generate analog voltages and not for controlling motors.

  Basically instead of lowering the voltage you use full voltage but turn the motor on and off very quickly.
  You control the speed by altering the duty cycle (percentage of on-time to off-time).

Bean.

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