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Simple?!!!!! I think that'd be hard (but doable) - especially to do it safely. Quite a cute idea and a meaty project for an Electronics Engineer. I've seen an eye gaze/computer/AAC integrated interface, made in the Netherlands, but have forgotten the name of the company, it might come back to me but probably not before your (or my) holiday... But it's not really 'direct mouse input' that way anyway... S -----Original Message----- From: A discussion list for Assistive Technology professionals. [mailto:[log in to unmask]] On Behalf Of Taylor, Barry Sent: Thursday, August 07, 2008 12:04 PM To: [log in to unmask] Subject: roller ball input to wheelchair Dear all Has anyone seen a tracker ball/mouse input to powered wheelchair? It would be fairly simple to make but I wonder whether any of the more modern systems might have a mouse interface? No, I'm not sure how the user will operate it & this brings up lots of questions, but at the moment I'm just being asked about how it could be achieved if needed. PS I'm only at work today before 10 days hol, so I'm after a quick answer! Barry Barry Taylor, Clinical Scientist Medical Physics Service Tulley Medical Physics Building, Hull Royal Infirmary Anlaby Road, Hull HU3 2JZ Tel: 01482 675928, Fax: 01482 675750 [log in to unmask] [log in to unmask] . No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.5.12/1596 - Release Date: 8/6/2008 4:55 PM *********************************************************************** This message may contain confidential and privileged information. If you are not the intended recipient you should not disclose, copy or distribute information in this e-mail or take any action in reliance on its contents. To do so is strictly prohibited and may be unlawful. Please inform the sender that this message has gone astray before deleting it. Thank you. 2008 marks the 60th anniversary of the NHS. It's an opportunity to pay tribute to the NHS staff and volunteers who help shape the service, and celebrate their achievements. If you work for the NHS and would like an NHSmail email account, go to: www.connectingforhealth.nhs.uk/nhsmail ***********************************************************************