geekhack
geekhack Community => Input Devices => Topic started by: cirthix on Sat, 11 June 2011, 13:17:07
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I was looking at the philips twineye (no liftoff issue with a trackball), are there others I should look for?
I will be making my own PCB for it, but I will need documentation on interfacing with the sensor. in-system programming via some common interface (SPI/I2C/RS232/USB) with free tools is needed, I will not be buying an expensive programmer for this.
The easiset thing to do would be to mod an existing mouse into the trackball, but I wouldn't mind making my own.
Requirements:
ease of use
inversion of x-axis or y-axis
ability to disable acceleration
no angle-snapping
no prediction
500 or 1000hz refresh
1000+ DPI minimum, higher is nice since you can always adjust it down.
good quality tracking
Thanks,
cirthix
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Avago 3080 would probably be best suited to your needs.
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The easiest way would be using a Deathadder, it would fit your requirement and it's easy to use because of the small 2 part PCB.
If you really wan't to build your own, sensor-wise you don't have to care about polling-rate (has nothing to do with the sensor). Sensors don't offer x/y axis inversion but ofc you can do whatever you wan't with the movement data (delta x/y) from the sensor.
The Avago ADNS-3090 would fit all your requirements but for such a project a lower-end sensor should also do the trick.
A Cypress OvationONS II is probably also a good choice because it's a single chip solution (MCU + Sensor)
In most cases the publically available information is probably not enough so you may have to contact the manufacturers (Avago, PixArt, Philips, Cypress).