9V DC Motor Control

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Hi everyone, I am new to arduino so this is probably a pretty basic question.
How can I control (using code) when a DC motor connected to a 9V battery is operating?
Is there some kind of switch that allows me to stop the connection between the battery and the motor when a digital port of an arduino is outputting current?

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If you are considering using a 9V battery like this.

600×600 44.9 KB

Don't.

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Welcome to the forum

Let's start with the subject of supplying power to the project and in particular the motor

The 9V battery that you mention is very likely what I know as a PP3 smoke alarm battery. It cannot supply enough current to run an Arduino for very long and certainly not an electric motor. You will need an alternative power supply, perhaps 6 AA cells in series

Now to how the motor is connected to teh Arduino. Do not power it from an Arduino pin whether or not there is a switch of some kind between the two. The Arduino is not a power supply and even with an external power supply an Arduino pin cannot supply enough current to drive anything more than sensors

So, what to do ?

  • use a better power supply than a PP3 battery
  • investigate motor shields. They allow an Arduino to control the speed and direction of an electric motor
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