Research and Select Magnatometer

[alihashemi2002]

Prerequisite Issues: None Followup Issues: TBD Related Issues: None

Summary

Research and determine if the autopilot would benefit from having magnetometer information. If so do further research and select an I2C or SPI magnetometer.

Terminal Objective

• Determine if a magnetometer is necessary for the quadcopter. If one is, design and purchase the magnetometer for the quadcopter custom autopilot

  Enabling Objectives

• Research need for a magnetometer for quadcopter autopilots
• If the sensor is required research to determine the resolution required for the sensor (what is the smallest change in magnetism that would be useful for us to detect?)
• Do all necessary calculations for the circuit design of sensor as well as any necessary external components
• Select the best sensor within the project budget
• I will submit a purchase request for the sensor

[tuanal]

quick question: what is the project budget for this sensor, found 1 for roughly $15.

[tuanal]

Link to the Magnetometer sensor, including schematic, data sheet and tutorial. Sparkfun HMC5883L ($14.95): https://www.sparkfun.com/products/10530

LIS3MDL (~$6) : http://www.ebay.com/itm/like/321958197317?ul_noapp=true&chn=ps&lpid=82 Datasheet for LIS3MDL: http://www.st.com/web/en/resource/technical/document/datasheet/DM00075867.pdf

Notes taken on magnometer: https://drive.google.com/folderview?id=0B1o-BQLmbOo5NFhaQkNLWERMalk&usp=sharing

[alihashemi2002]

@tuanal I like the LIS3MDL. Nice chip. What were the specs you decided to design around?

What are your resolution and accuracy? How many sensors do you think are necessary?

[tuanal]

I'll look at the datasheet one more time tonight and i'll have some info for you tomorrow.

[tuanal]

Magnetometersresearch.pdf

[alihashemi2002]

@tuanal awesome, looks great, thank you!