Electronic – arduino – Multiplying the voltage of an output pin on an Arduino board

arduinodc motor

I am in hold of an Arduino board and 12V DC motor.
I need to be able to control the motor speed gradually, my intention is to output a PWM current in range of between 0 and the maximum 5V of the board to the motor.

My question is what do I need to have in order to multiply the output from the range of 0 – 5V to 0 – 12V to fit the motor?

Best Answer

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ditto

Some people prefer MOSFETs

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ditto

See also prior art

For a bigger motor you might use a BJT to turn on a heftier MOSFET

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ditto

Important notes

  • Ensure you use a switching device that can comfortably handle more than whatever maximum current the specific motor will need.
  • It is good practice to have a snubber diode across the motor to prevent it causing damage to the switching elements.
  • The ground of the motor's power source should be connected to the ground of the Arduino's power source (e.g. the header socket marked "GND")
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