Date: Sat, 03 Feb 2007 23:00:28 +0000 From: Colin Stamp <col.dustbinnospamp.plus.com> Subject: Re: canbus ibus sid steering wheel controls 93 9-3 ss sport saloon sedan 2007
On 3 Feb 2007 11:48:33 -0800, "installer69" <googlenospam-indulgence.net> wrote: >Colin, AFAIK the buttons are still cascading resistance. I am just >waiting for a wiring diagram so I don't airbag myself. Maybe I'll get >the wife to sit next to me with the camcorder going just in case - how >much are they paying for those videos on the TV nowadays? If I could >convert the resistance values from the phone connect/disconnect >buttons into a momentary switch I would wire them to my bluetooth >phone kit buttons and have control. Are you near Kent? Wanna go halves >on a CANBUS thingy and start sniffing? > >The electric hood (that's roof not bonnet if you're from the US - >we're not THAT lazy in the UK) button is indeed cascading resistance - >I know, I the switch out of the dash and hooked up my multimeter to >test it then stuffed the relevant resistors in the switches plug and >opened and closed the roof. > >I did start playing with my Audi - for which there is a lot more CAN >info out there including an adaptor to display the valentine one radar >detector readout on the in dash display (see http://audi.caughtbluehanded.com/index.html) I'm in Milton Keynes, so not *too* far, but the problem is time rather than distance. It's the old sob-story of juggling a young family, work and attempting to build a kit-car. At the moment, the kit-car is only getting an hour or two a week and the Saab is just getting totally forgotten. Once the kit-car's on the road, I've promised to organize moving house... If it does turn out that the phone buttons are resistance-based, then I could probably scrawl out a circuit diagram for a simple analogue gadget to convert the resistance to relay contacts. I guess you'd need a window comparator for each button. A quad op-amp(14 pin IC) and a few discretes should handle two buttons. That'd definitely be a quicker way to get the buttons working than making a CAN bus gadget. Of course, it wouldn't do anything for displaying numbers on the SID though. Cheers, Colin.