On Sunday 23 November 2008, Alessandro Sappia wrote: > On Sat, Nov 22, 2008 at 11:46 AM, Al Johnson > > <[EMAIL PROTECTED]> wrote: > > On Friday 21 November 2008, Alessandro Sappia wrote: > >> Hi > >> Me and some friends wants to connect the freerunner to some kind of > >> sensor. We saw that the debug connector give us the SPI bus. > >> is it a good choice ? > > > > It has been suggested in the past. I don't know if anyone's actually > > tried it yet though. > > which ones are the connection used in some other projects ? I wasn't > able to fount any > project involving some hardware extension.
Several options have been talked about, but the only one I've seen documented was the DAB radio one soldered to the USB port. > >> is there a point where to take power near there (the debug connector > >> doesn't export it... > > > > R4701 and R4702 next to the debug connector have one end on the IO 3.3V > > line, but may not be a good place to pull power from. R7802 on the other > > side of the speaker has the 3.3V supply for the accelerometer which may > > be better. It probably depends on your power supply requirements though. > > > > I assume you've found the schematics: > > http://downloads.openmoko.org/schematics/GTA02/ > > Yes, we have the schematics, but we really miss a good hardware hacker > between us :) > the 3.3V supply seems fine. le'ts give it a try. we have to give power > to an OPAMP. That doesn't narrow the requirements down much ;-) What is it you're trying to do? > I didn't check if the soundcard is easily reachable, but we may > substitute the ADC on the > external sensor with it (opamps are always needed to get a bigger signal). Could be an option, again depending on what you're doing. _______________________________________________ hardware mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/hardware
