Solo 300 Motor Controller



The Solo 300 is an intelligent motor controller designed to control one brushed DC motor at up to 300 Amps continuously. It can be controlled from USB, RC radio, PWM, TTL serial, analog, and microcontrollers such as Arduino or Raspberry Pi.


The Solo 300 automatically supports 3.3V or 5V logic levels, travel limit switches, home switches, emergency stop switches, power supplies, braking systems, and contactors. A built-in switching mode BEC supplies 5VDC at up to 1.2 Amps for powering user devices.


Brushed DC motors can be controlled in open or closed loop using position or velocity control modes. It features several built-in commands for controlling acceleration, deceleration, distance, speed, current sense, voltage limits, and more. RC and analog control modes also include several user-defined settings such as acceleration and deceleration rates.


Quadrature encoders with up to 19.6 million pulses per second are supported and can be auto-tuned using Motion Studio, a free downloadable application. In addition, a wide range of sensor inputs, including potentiometers and absolute encoders, are supported. The closed-loop functionality enables total control over speed, velocity, and direction regardless of load changes.


The Solo 300 incorporates several protection features, including over and under-voltage, temperature, and current limits. Several user-definable settings such as maximum and minimum battery voltages and maximum current limits provide more refined control.


The Solo 300's regenerative braking will charge the battery when braking. Its advanced circuitry can change direction during full throttle without damage, and it has a LiPo cutoff mode to prevent battery damage.



Control via:



User's Manual


Motion Studio

Solo 300 High-Voltage Controller - $499 Quantity



Speed Adjuster



  • This speed adjuster plugs into the radio control inputs of the motor controllers.
  • It is a quick and easy way to send control signals to the motor controllers without the need for an RC transmitter or receiver.
  • Turn the knob to control the motors from full forward to full reverse or anywhere in-between.
AmpFlow Speed Adjuster - $20 Quantity


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