On Friday 18 September 2009, RANJAN wrote: > On Fri, Sep 18, 2009 at 8:35 PM, Al Johnson > > <openm...@mazikeen.demon.co.uk>wrote: > > On Friday 18 September 2009, RANJAN wrote: > > > Hi, > > > > > > I was wondering why FR has two accelerometers.They could have one 3 > > > axis accelerometer and a single angular rate gyro.How is a combination > > > for 2 accelerometers more useful than one 3 axis accelerometer and a > > > gyro? > > > > Or, better, use a 3-axis magnetometer instead of a gyro. > > > > At the time the FR was designed, gyros were significantly more expensive > > and > > less available than accelerometers, and magnetometers were large and even > > more > > expensive. Spaced accelerometers sounded like a good way of getting most > > of the way there while still being affordable. In practice it doesn't > > work so well. In the meantime gyro and magnetometer prices have tumbled. > > I think when FR was designed the Gyros costed around USD 17 .Is there a > next version of Openmoko phone being designed?
Openmoko are designing something that we don't know the details of, but that is supposed not to be a phone. The gta02-core project is designing a phone, but this is more about the community development process and tools than the design itself. The aim is to produce a handful of boards, and if they're lucky they might even work. http://wiki.openmoko.org/wiki/Gta02-core There's a project to add a magnetometer to existing FRs using a little PCB above the SIM. http://wiki.openmoko.org/wiki/Talk:I2C_Compass There's also the Flow which is fairly open and potentially fully featured, but rather expensive. http://www.gizmoforyou.com/e107_plugins/content/content.php?content.32 _______________________________________________ devel mailing list devel@lists.openmoko.org https://lists.openmoko.org/mailman/listinfo/devel
