Hi,
A few random comments.
On May 12, 2013, at 8:59 AM, address@hidden wrote:
I´m have done LIA, it´s near complete. Now i´m beginning with
LISA, same size of LIA, bigger as actual lisaM.
Do you have other wishes ? Is someone on the list willing to test
the board ?
Differnces to previous LIA:
MPU-9150 footprint inside ASPIRIN footprint.
Don't forget baro. And also be careful with that ... please don't
bring back the i2c nightmare! Also reading out all the sensors with
i2c will be probably at least on the verge of impossibility and will
force you to use the invensense motion engine. Consider designing
towards MPU-9250.
PA6H GPS module including external Antenna added.
Xbee socket added.
I have not seen your design. But that sounds like a big space waste
on the board.
possibly to reflow micro-SD card on the pcb.
Good idea. Think about manufacturability...
Improvements on powering section.
What does that mean? :)
TODO:
remove USB connector.
Why?
add usb protection circuit.
What do you mean? If you mean ESD protection, then I think that is
totally unnecessary in this application and just waste of space and
weight. If you mean reverse voltage protection, please elaborate.
Added RS485 as lower cost bus option or instead of can
I hope you mean ADD and not replace. CAN vs RS485 transceiver price
difference is almost negligible. About 4cents a peace at 100 pcs...
having a well defined protocol with filtering options and built in
collision avoidance vs a custom protocol is in my opinion a better
choice in most cases. But correct me if I am wrong.
As I did not see your designs take my comments with a grain of
salt. :) Sorry if I missed a link to your github or something. Are
you putting them somewhere?
Good luck with your project.
Cheers Piotr
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