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$10, 10-DOF Attitude/Barometric Sensor I2C — Parallax Forums

$10, 10-DOF Attitude/Barometric Sensor I2C

ercoerco Posts: 20,255
edited 2014-08-14 08:25 in Accessories
Actually $9.98 http://www.ebay.com/itm/400486732951

Mine just arrived (7-day ship), time to play. Cheap entertainment at less than a buck per DOF. Hope I don't lose the tiny little thing before I get a chance to release the magic smoke.

1. Nine axis modules (three-axis gyro + three axis acceleration + tri-axial magnetic field +BMP085 ).
2. Using immersion gold plating PCB process.
3. Module chips: L3G4200D+ADXL345+HMC5883L+BMP085.
4. Power supply: 3V-5V.
5. Communication mode: IIC communication protocol (fully compatible with 3-5V systems, including LLC circuit).
6. Board size: 25.8mm*16.8mm.

Comments

  • PublisonPublison Posts: 12,366
    edited 2014-08-13 15:52
    erco wrote: »
    Actually $9.98 http://www.ebay.com/itm/400486732951

    Mine just arrived (7-day ship), time to play. Cheap entertainment at less than a buck per DOF. Hope I don't lose the tiny little thing before I get a chance to release the magic smoke.

    1. Nine axis modules (three-axis gyro + three axis acceleration + tri-axial magnetic field +BMP085 ).
    2. Using immersion gold plating PCB process.
    3. Module chips: L3G4200D+ADXL345+HMC5883L+BMP085.
    4. Power supply: 3V-5V.
    5. Communication mode: IIC communication protocol (fully compatible with 3-5V systems, including LLC circuit).
    6. Board size: 25.8mm*16.8mm.

    You are going to run this on a BS1 with 18 servos on a hexpod, right? :)
  • PublisonPublison Posts: 12,366
    edited 2014-08-13 15:59
    Not a bad deal since Adafruit wants $9.95 for the new barometric sensor by itself, replacing the old $19.95 board.
  • ercoerco Posts: 20,255
    edited 2014-08-13 16:11
    Publison wrote: »
    You are going to run this on a BS1 with 18 servos on a hexpod, right? :)

    A BS1 is overkill. This will control a BEAM robot with two transistors and a 555 timer. :)
  • Duane DegnDuane Degn Posts: 10,588
    edited 2014-08-13 17:04
    You almost had me with this one but they want an outrageous $1.98 for shipping?! Come on, it's only coming from China.

    I noticed, as with many cheap sensor boards, they didn't keep the copper pour out from under the HMC5883L chip. According to the HMC5883L datasheet, there shouldn't be any copper under the chip (on either side of the board). I doubt it really matters much. I've used boards with and without copper under the chip and I didn't notice a difference in performance.
  • prof_brainoprof_braino Posts: 4,313
    edited 2014-08-14 08:25
    erco wrote: »
    Actually $9.98 http://www.ebay.com/itm/400486732951

    Mine just arrived (7-day ship), time to play. Cheap entertainment at less than a buck per DOF. Hope I don't lose the tiny little thing before I get a chance to release the magic smoke.

    1. Nine axis modules (three-axis gyro + three axis acceleration + tri-axial magnetic field +BMP085 ).
    2. Using immersion gold plating PCB process.
    3. Module chips: L3G4200D+ADXL345+HMC5883L+BMP085.
    4. Power supply: 3V-5V.
    5. Communication mode: IIC communication protocol (fully compatible with 3-5V systems, including LLC circuit).
    6. Board size: 25.8mm*16.8mm.

    Code for interactive testing, and IMU project in progress:

    https://code.google.com/p/propforth/wiki/IMUdemo

    NOTE: May contain FORTH code. Kalman filter (using integer math) not yet available.
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