Wiring a DC motor to two 9 volt batteries

[bcheero]

Hey everyone. I'm a beginner when it comes to making stuff with motors and batteries. Could anyone give me a link or a very good explanation on how to wire a 9 volt DC motor to 2 9V batteries (that are supposed to be wired in parallel) to power a propeller? I have the motors and the batteries, but I need the necessary wiring and knowledge to construct it.

Thanks for the help.

 

[Fish4Fun]

You connect the positive terminals of the batteries together and to one lead of the motor, then the negative terminals together and to the other lead on the motor.

Fish

 

[bcheero]

Wow, thank you very much. I really appreciate the help!

Also, can you tell me how to change the voltage on this DC motor? http://www.radioshack.com/product/index.jsp?productId=2102827

The device that I'm using to power should have a maximum of 12 V, but this motor can go to 18 V. I can't let this compromise my entire project on the day of competition.

 

[Fish4Fun]

There is nothing to "change", just use the diagram above and all will be fine.

Fish

 

[bcheero]

Excuse me for my lack of knowledge regarding this, so you're saying that it'll stay at 9V.

AH I see now. When wiring something in parallel, the total voltage stays the same. So in effect, the motor will still be running at 9 V. Feel free to correct me if I'm wrong with the physics behind this.

 

[Integral]

Since you have a 18VDC motor you could wire the 2 9V batteries in series. That is connect the batteries + to - with the remaining + and - terminals to your motor. This will give you 18V and the highest speed. It will also drain your batteries faster. To resolve that you could use 4 batteries, 2 pair of series batteries connected in parallel as in post #3.