HMC5883L with external magnet

GY-273 HMC5883L Compass A. I'm waiting for my chip to arrive and will attach it to a RasPi. B.  My question is: if I align my chip to "N" then rotate a magnet round the chip - i.e. a weathervane - thoughts on how that might work? C. Can my magnet, if too strong/close, damage my chip? Thanks

Topic by liderbug   |  last reply


HMC5883L file error with Arduino 1.0.6

M using the HMC5883L sensor as part of my project but the HMC5883L file leads to an error when im compiling in the new versions of Arduino, 1.0 onwards. Works fine with the Arduino 0022. Ive performed the functionality changes which came about in 1.0 on the codes but the file erroe stills persists. This the error i receive: This report would have more information with   "Show verbose output during compilation"   enabled in File > Preferences. Arduino: 1.0.6 (Windows 7), Board: "Arduino Duemilanove w/ ATmega328" C:\Program Files\Atlassian\Arduino\libraries\HMC5883L\HMC5883L.cpp: In member function 'void HMC5883L::Write(int, int)': C:\Program Files\Atlassian\Arduino\libraries\HMC5883L\HMC5883L.cpp:110: error: 'class TwoWire' has no member named 'send' C:\Program Files\Atlassian\Arduino\libraries\HMC5883L\HMC5883L.cpp:111: error: 'class TwoWire' has no member named 'send' C:\Program Files\Atlassian\Arduino\libraries\HMC5883L\HMC5883L.cpp: In member function 'uint8_t* HMC5883L::Read(int, int)': C:\Program Files\Atlassian\Arduino\libraries\HMC5883L\HMC5883L.cpp:118: error: 'class TwoWire' has no member named 'send' C:\Program Files\Atlassian\Arduino\libraries\HMC5883L\HMC5883L.cpp:129: error: 'class TwoWire' has no member named 'receive'

Topic by AmitP2 


How to make the GY-87 work probably ?

Hey, This my first question and ... action here with this new account :) My problem is I'm making a quad-copter, which needs some balance and no problem of adding some features like alt. measurement and so. I bought a GY-87 10DOF chip which combines 5 sensors :- MPU6050 Gyroscope MPU6050 Accelerometer BMP085 Barometer BMP085 Temperature sensor HMC5883L Magnometer I don't know yet how to make the quad-copter balance using the chip but I'm focusing now on making the chip work at all. After 7 hours of searching I could get a messy code using KALMAN filter to get the gyro and accel angels which worked fine eccept that the code combines the Z axis with the compass reading and I need to understand how to make every reading separate, which get us to the secong problem, the compass is stuck at 50.3 degrees, after reading i found that i must enable the I2C cuz both of the MPU and the HMC uses the same bus ways, I added a delay (100) ms to let the HMC get it's reading, i could make it work till I realized that the reading is not from 0- 360, it's between 200 and ... maybe 342 ! although making the BMP work was difficult a bit.. now my questions are :- -Understand how the gyro code works or at least add the Z axis of the the gyro not the compass -How to make the compass work probably Files:- https://drive.google.com/open?id=0BxGMyrtCX-KJVHB5S1luZ3VLeGM Libs:- https://drive.google.com/open?id=0BxGMyrtCX-KJcXZ6VlZmejRDR2c

Question by Mavrick23