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Description: This is a tiny trackball akin to those found on a number of Blackberry models (8100, 8300, 8320, 8800, 8830, etc). Each of the four spindles have a tiny circular magnet on each end. Great when paired with very small SMD Hall effect sensors.

Ball is clear to allow for LEDs placed underneath to light up the ball.

Features:

  • Center select button
  • 360° direction

Dimensions: 9x11mm

Documents:

Comments 16 comments

  • Wouldn’t it only need 2 hall effect sensors, one for each axis (X and Y)?

  • Can i use this to detect diagonal directions? can it engage two orthogonal rollers?

  • I saw the comment that “when rolling the ball R, the L roller does not turn”. I need to detect the direction and speed of a shaft on which is mounted a magnet. The speed is easy, but the direction has me stumped, any ideas anyone?

  • I can’t tell from the picture - how is this thing mounted? Is there a datasheet on it somewhere? I use a different circuitboard creation software that doesn’t support Eagle libraries, so I kinda want to know how to mount it without actually buying it first.

    • It’s reflowed directly to a board. Your best (and only option really) is to look at the footprint in the eagle library. It’s free and I’m sure you could export it, or at least translate it.

  • Im about to order this in a couple days… why dont you sell the hall effect sensors?
    They would be nice, even for other projects.
    Is this the sensor:(?)
    http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=AN48841B-NLDKR-ND
    It says not recommended for new designs… does that mean it will soon be phased out? if so what do you recommend as a replacement…

    • Well…there is a hall effect sensor listed in the related products. Not the greatest ever but I’m sure it would work for this purpose.

      • Kind of late but i should note i have tried the Through hole version of the SS461C and works well… so i assume the SOT version should as well…
        http://www.mouser.com/ProductDetail/Honeywell-Microswitch/SS461C/?qs=sGAEpiMZZMvf33FveHAO1PBM8tp%2f9ADc
        So as a TIP use a BiPolar Latching Hall effect sensor and you should be fine!

  • i would pay extra for it to be presoldered

  • Does anyone have a mechanical drawing of this trackball so I can use this in my project? Kinda difficult to make a case for something without one.

  • Are you sure that this is in the SFE library because I just downloaded the most recent version and could not find it in there.

  • Does this actually include the hall effect switches? If it did, this would make an extremely interesting part!

    • It does not. Basically, this is just the mechanical portion of the trackball with the magnets. To actually use it you need to add hall effect sensors and (for “center select”) a button to sit underneath it. Check out the breakout board and its schematic for more info.
      As I understand it - the reason you need four hall effect sensors and not just two is that the trackball actually has four magnets - when you roll the ball right, it turns just one of the two magnets associated with the X axis…


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