Submitted by fabio on Fri, 2011-04-15 00:33.
The first units of FreeIMU v0.3 have just been assembled, tested and shipped to the testers but I'm already at work for the next FreeIMU v0.4.
With FreeIMU v0.4 I'd like to start experiencing with the new generation of high resolution altimeter sensors, specifically the MS5611-01BA which is, according to its datasheet, capable of an altitude resolution of 10 cm. I'd also like to try the new MPU6050 which should be finally out when FreeIMU v0.4 will be ready.
I'm going to remove the integrated logic level converter we had in v0.2 and 0.3 as it adds considerable complexity in the schematics, PCB designs and at assembly time. So, the idea with FreeIMU v0.4 is to make it pluggable into my logic level converter thus reducing the complexity of FreeIMU while maintaining the LLC features with an easy to add plug-in.
I already sketched some designs of FreeIMU v0.4, which I add a picture below. If you are interested in them, they are available on FreeIMU repository as usual.
I expect to be able to build the first units of FreeIMU v0.4 in something like 2 to 3 months, so don't hold your breath. I've been able to source the MS5611-01BA as well as all the other chosen components, the only problem is still the MPU6050 which is still not available. My last communications with Invensense EU distributor told me its availability around end May or beginning of June, however they had delayed it's release date constantly for the last six months so I don't know if we can rely on this expected date.
Btw, here it is, my new design of FreeIMU v0.4: