About

Gender

Male


Location

Pleasanton, CA


About Me:

I am studying Mechatronic Engineering at Chico State, and work at Tesla Motors in Fremont.


Please tell us a bit about your UAV interest

There is something awesome about giving an inanimate object autonomy...


Hometown:

Pleasanton


Activity Feed

Brett Smith posted a discussion
Hello All! I am working on a project where I have two devices that constantly trying to locate eachother using GPS modules and LoRa transcievers. Its a buddy tracker for spearfishermen, to make it easier to locate your partner when you're out in…
Jan 5
Brett Smith replied to Brett Smith's discussion Magnetometer Tilt Compensation Tutorial + Sensor Analysis
"Hey guys, it has been a while since I worked on this. I am glad other people are looking at it. I struggled for a long time with magnetometers, and really could not find any decent explanation on why the rotation matrix is constructed this way.
Were…"
Feb 16, 2015
Brett Smith commented on Jonathan Meringer's blog post Scout Drone - Video Update
"Shut up and take my money"
Nov 8, 2014
Brett Smith commented on Lester Haines's blog post Results in from Vulture 2 avionics stratospheric test flight
"I was under the impression that most off the shelf GPS units do not work at this altitude, but obviously this is not the case. Do companies (like ublox) put any firmware restrictions so they do not operate at certain altitudes/velocties???"
Nov 8, 2014
Brett Smith replied to Brett Smith's discussion Magnetometer Tilt Compensation Tutorial + Sensor Analysis
"Hmm, my tilt-compensation looks exactly the same:

//My Math: Rotation Matrix from body frame to vehicle 1 frame magComp[0] = (magVector[0]*cosPitch) + (magVector[1]*sinRoll*sinPitch) + (magVector[2]*sinPitch*cosRoll); magComp[1] =…"
May 8, 2014
Brett Smith replied to Brett Smith's discussion Magnetometer Tilt Compensation Tutorial + Sensor Analysis
"Are you programming your own IMU?Make sure your sensors axes are all inline. For example, I am using an MPU-9150 which consists of two sensors.



So in my case, I switch the x and y values of the magnetometer, and switch the sign on the z-axis.…"
May 8, 2014
Brett Smith posted a discussion
Hello All!I have searched far and wide for a good tilt-compensation algorithm, and a decent tutorial  to accompany it. I have read application notes and looked at lots of source code, but I never really understood where it was coming from, and none…
May 6, 2014
Brett Smith replied to Nikola Rabchevsky's discussion Calibrating 3-axis magnetometer in a large heavy vehicle?
"Do you have a picture of the vehicle?

I guess the simplest thing to do would be to drive the vehicle around for a bit collecting magnetometer data...

Or would that not give you the data you need?"
May 5, 2014
Brett Smith commented on Carles Gelada's blog post Irresponsable and Immoral
"I am not familiar with their transmitter...I haven't even used ArduPilot extensively (I've been playing around trying to build my own platform), but I still have received lots of help from nice people here.
Honestly, from what I can perceive, the…"
Feb 24, 2014
Brett Smith commented on Carles Gelada's blog post Irresponsable and Immoral
"I think you should give hobbyists more credit, I would guess that a hefty percentage of those people going on to kickstarter to back a project like this are already involved in RC in some form."
Feb 24, 2014
Brett Smith left a comment for Christopher Leveck
"Hello!My name is Brett Smith, and I saw that you were trying to back the Thalumus project on kickstarter. I have been putting together an open source AHRS for one of the engineering clubs, using an 8-bit AVR instead of a full ARM cortex. I am trying…"
Jan 21, 2014
Brett Smith replied to Brett Smith's discussion LSM303DLHC Magnetometer Help! POLOLU IMU
May 16, 2013
Brett Smith posted a discussion
Hello All,I have been working on an propeller based autopilot for a while now, and things have been coming along great. Although I was nervous about the lack of interrupts, the faster speed and multiple cogs have made timing the program efficient. I…
May 15, 2013
Brett Smith posted a blog post
Aug 5, 2012
Brett Smith replied to Rahul Vyas's discussion Need urgent help guys please.
"Start building up your code! I would start testing your electronics on a breadboard.
Make sure you can provide all sensor data to the arduino mini pro. Make sure you can use your arduino to arm all ESCs and to control the speed of all four motors.…"
Jul 24, 2012
Brett Smith replied to Dronez's discussion 6-7 Hour Flight time over ocean - some questions
"If you are looking for endurance flight of an automated model aircraft, you absolutely should check out Maynard Hill's TAM 5. The TAM 5 crossed the Atlantic ocean in over 38 hours with about a gallon of fuel. They used a OS .61 retrofitted for…"
Jul 23, 2012
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