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September 14, 2010
about a year ago
Please update the datasheet or link thereto. The current link points to a preliminary data brief. Mouser links to a datasheet at http://www.mouser.com/ds/2/389/DM00112632-490369.pdf .
about 2 years ago
433011, did you get this working? I’m interested in doing the same thing in my Bixler, where I have my APM 2.5 mounted too near some power wiring.
about 2 years ago
The link above for the Expansion Board, http://store.diydrones.com/ProductDetails.asp?ProductCode=KT-0001-01 , doesn’t work.
Ditto on the link for the X, Y, and Z sensors, http://store.diydrones.com/ProductDetails.asp?ProductCode=SE-0002-01 .
about 3 years ago
I’m having a bit of trouble reconciling the “bandwidth” (frequency response?) spec on this thing with the chart in the data sheet, which seems to show a pretty flat response from around 50 Hz through 1 kHz. I can see why you’d need a pretty good LPF between this thing and an A/D converter with a 500 Hz sampling rate.
News - Sending a Balloon Into Ne…
about 5 years ago
Figured it was either a bug in the firmware or a bug in the datasheet :-) The problem with testing the firmware is you either need a GPS satellite simulator or a vehicle that can take you to altitude. The latter will be cheaper until the National Helium Reserve runs out of gas (thanks to Congress directing it be privatized).
It’s my understanding that many civilian GPS receivers have an altitude limit of 60,000 ft, ~18 km. 60,000 ft is the upper limit of FAA-controlled airspace, so I guess somebody decided that civilian GPS receivers shouldn’t have to work above that altitude. Why anyone who could build a missile that would fly above 60,000 ft would not be able to figure out how to navigate it up there is beyond my ability to feel paranoid.
Edit: Here’s a GPS module from uBlox, a Swiss company, with an altitude limit of 50 km and a speed limit of 500 m/s (only works for those really slow ballistic missiles :-). It’s their LEA-6 series of GPS modules:
http://www.u-blox.com/images/downloads/Product_Docs/LEA-6_DataSheet%28GPS.G6-HW-09004%29.pdf . I’d like to see a BOB for these.
The SUP500F or the Venus 634FLPx Sparkfun sells might_ work–specs say altitude < 18,000m OR speed < 515 m/s. Hate to spend several hundred bucks building and launching a balloon to find out.
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