wam

Member Since: October 26, 2010

Country: United States

  • Product SEN-11486 | about 2 months ago

    You should look at the AD parts: http://www.analog.com/en/mems-sensors/mems-inertial-measurement-units/products/index.html#iSensor_MEMS_Inertial_Measurement_Units

    Decent in-run bias specs… expensive tho.

    Great write up comparing more traditional discrete FOG-based and MEMS: http://www.insidegnss.com/node/3123

    PDF - http://www.insidegnss.com/auto/julyaug12-Goodall.pdf

    Stability is a big deal with these lower cost units - we added a small Peltier to get the invenSense a bit better - pain to do tho and still not so great.

    Another great article on IMU’s here: http://www.memsjournal.com/2010/12/high-performance-mems-gyroscopes-current-status-and-emerging-trends.html

    Note where he mentions RLG and FOG’s are about 1,000 better than these MEMs units.

  • Product SEN-12636 | about 2 months ago

    Both the InvenSense and ST part have some issues…

    Check out http://www.openshoe.org/ Those AD parts are great - expensive tho:

    http://www.analog.com/en/mems-sensors/mems-inertial-measurement-units/products/index.html#iSensor_MEMS_Inertial_Measurement_Units

  • Product DEV-10915 | about 2 years ago

    Interesting - I had to replace the series resistors with 0 ohm on the TX/RX to get 115200 … R1 and R3.

    Worked great on the UNO smd and Rev 2 I have…

  • Product BOB-08882 | about 3 years ago

    Here’s a link to the Allegro dev kit for 20A:
    http://www.allegromicro.com/en/Products/Part_Numbers/0712/ACS712_Demo_Board.pdf
    note that’s 4oz copper on top/bot with via stitching… see page 7 of the above link
    … most quick turn PCB’s houses don’t do that heavy a copper… and if they did it would be $$$
    Link to the store $20.00:
    http://prostores2.carrierzone.com/servlet/AllegroMicroSystems/Detail?no=386

    Not sure if its in stock tho…

    WAM
    http://home.comcast.net/~ajawamnet/wc/wamcover.htm

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