# A Note on the Polarity of the Famous TT Motor

I’m using this article to record the polarity (direction) of the TT motor, which is commonly used in hobby models.

<figure><img src="https://1287130752-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FvVJ0h2a4qMIhB1I8GdV8%2Fuploads%2Fgit-blob-853ecd0e19db762d6356e5e5a59c5919b1c5cc77%2Fimage.png?alt=media" alt=""><figcaption></figcaption></figure>

After some testing, we get the following relation between the motor and the wheel:

<figure><img src="https://1287130752-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FvVJ0h2a4qMIhB1I8GdV8%2Fuploads%2Fgit-blob-9656a985a53e77c53ee523a584e186cc17f4ef82%2Fimage.png?alt=media" alt=""><figcaption></figcaption></figure>

We define "positive" direction of the motor to be the counterclockwise rotation of the motor shaft when facing the motor shaft.

<figure><img src="https://1287130752-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FvVJ0h2a4qMIhB1I8GdV8%2Fuploads%2Fgit-blob-e7cd85f03595cbc0240c5eba3e12bb92c2695269%2Fimage.png?alt=media" alt=""><figcaption></figcaption></figure>

And thus, we can know that the “positive” lead of the motor is at the left side, when viewing from top to bottom

<figure><img src="https://1287130752-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FvVJ0h2a4qMIhB1I8GdV8%2Fuploads%2Fgit-blob-fe7c82777c6ff3cd8c145d26d5cf199694498189%2Fimage.png?alt=media" alt=""><figcaption></figcaption></figure>