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geekhack Community => Input Devices => Topic started by: TastaturenAuslese on Thu, 03 September 2015, 16:11:03

Title: Converting CH DT225 to USB?
Post by: TastaturenAuslese on Thu, 03 September 2015, 16:11:03

Just offered for this on eBay and the seller accepted: http://www.ebay.ca/itm/370865583055?euid=8556249a1118427c815878499899b5e7&cp=1

Any idea how I can use this? Not familiar with this bus at all.

Title: Re: Converting CH DT225 to USB?
Post by: TastaturenAuslese on Thu, 03 September 2015, 16:13:57

On that note, do you think $85 USD is a good deal for this?

Title: Re: Converting CH DT225 to USB?
Post by: SpAmRaY on Thu, 03 September 2015, 16:13:59

https://geekhack.org/index.php?topic=68612.0 (https://geekhack.org/index.php?topic=68612.0)

https://hackaday.io/post/18119 (https://hackaday.io/post/18119)

http://www.epiguru.com/2012/07/new-project-restoring-a-ch-products-dt225-trackball/

Title: Re: Converting CH DT225 to USB?
Post by: GuilleAcoustic on Fri, 04 September 2015, 02:19:36

Hi, nice find. I don't know if my firmware can be used as it is done for raw quadrature signals (BUSMOUSE protocol). I have the manual at home with the access bus pinout, I'll check what I can find.

Title: Re: Converting CH DT225 to USB?
Post by: lkong on Sun, 08 November 2015, 11:19:54

There‘re lots of variations of DT225 out there.
I've seen 3 layouts online but they are all different from the one I have. :'(
If it's indeed a bus mouse this should help: http://deskthority.net/other-devices-f3/ch-products-trackball-pro-t9874.html

Title: Re: Converting CH DT225 to USB?
Post by: SamirD on Mon, 09 November 2015, 19:50:09

Man, I remember back in the day when you could get bus mouse cards at Dalco a dime a dozen.  Where are those cards when you need one...

Title: Re: Converting CH DT225 to USB?
Post by: Homenubbie on Tue, 10 November 2015, 16:44:04

Never heard of Access Bus.

Title: Re: Converting CH DT225 to USB?
Post by: MeltingTeeth on Thu, 12 November 2015, 09:09:57

Phillips "standard":

https://en.m.wikipedia.org/wiki/ACCESS.bus

Title: Re: Converting CH DT225 to USB?
Post by: GuilleAcoustic on Thu, 12 November 2015, 09:19:20

I imagine that it could easily be adapted with an arduino.