"Maybe there just aren't a lot of sats in view. This may help us find out what's in view, when. http://www.wwu.edu/huxley/spatial/GPS/ephemeris.htmSatellites typically report SV (space vehicle) info, like what's being tracked, what the…"
-
Bot Thoughts
- Male
- Littleton, CO
- United States
- Blog Posts (7)
- Discussions (124)
- Groups (1)
- Photos
- Photo Albums
- Videos
Bot Thoughts's Discussions
For Sale: CHR-6DM AHRS - 300Hz EKF, ARM
Started Apr 4, 2012 0 Replies 0 Likes
I have a CH Robotics 6dm AHRS for sale. Briefly used on a ground vehicle a few…Continue
Magnetometer Soft- and Hard-Iron Calibration
Started this discussion. Last reply by Kaleb on Tuesday. 14 Replies 0 Likes
I'm using an LSM303DLM on a Pololu MinIMU-9 board as part of an AHRS. The software is ported to mbed from Pololu's example code which is in turn ported from ArduPilot 1.5. But that's no what this is…Continue
Tags: compass, hard-iron, soft-iron, calibration, magnetometer
Data Bus: autonomous ground vehicle
Started Oct 8, 2011 0 Replies 0 Likes
Data Bus was my Sparkfun AVC 2011 ground vehicle entry. Its based around…Continue
Tags: ugv
RSS
Loading feed
Bot Thoughts's Page
Latest Activity
Bot Thoughts replied to John Moore's discussion John's Crawler Drone Build Thread in the group ArduRover User GroupBot Thoughts replied to John Moore's discussion John's Crawler Drone Build Thread in the group ArduRover User Group"How does it work outside? Every GPS is going to suck indoors. You may get a lot of sats and low hdop, but real accuracy will suck compared to outside.
Your accuracy is particularly bad, but maybe only 2 or 3 times worse than GPSs I've tested so…"
Bot Thoughts replied to John Moore's discussion John's Crawler Drone Build Thread in the group ArduRover User Group"The uBlox ucenter tool is an extraordinarily nice piece of GPS software.
I had the Locosys LS20031. I'm glad I fried it. :) I had better luck with an old Pharos iGPS-500 which is based on a SiRF III. But even it sucked at the AVC in…"
Bot Thoughts replied to John Moore's discussion John's Crawler Drone Build Thread in the group ArduRover User Group"I'm not sure.
It ran fine off an Arduino Pro and I'm not aware of problems on the APM (?) so I am assuming it's due to the higher speeds of the ARM.
It may also have been due to my 5V SMPS but that doesn't explain the need for…"
Bot Thoughts replied to John Moore's discussion John's Crawler Drone Build Thread in the group ArduRover User Group"I ran a MediaTek briefly on Data Bus and was less than pleased with the performance and position accuracy. For ArduPilot/Rover I guess uBlox is the only other option? If not I am a huge fan of the Venus 638FLPX. I'm going to be comparing uBlox…"
Kaleb replied to Bot Thoughts's discussion Magnetometer Soft- and Hard-Iron Calibration"Hello Göran,
As far as I know, my solution for ordering the radii is unique and I would prefer not to share it. I will tell you that is surprisingly simple (it requires no new equations, only an understanding of what you are already…"
Bot Thoughts replied to Thomas J Coyle III's discussion Getting Ready for the Sparkfun 2013 AVC in the group ArduRover User Group"Speaking of magnetometers, I'm curious to know if you've done any tests to see how much the motor affects the compass. When I tested, it was with a 20T brushed motor drawing 20A (with no flux ring) and it had a tiny impact on heading. I…"
Bot Thoughts replied to Thomas J Coyle III's discussion Getting Ready for the Sparkfun 2013 AVC in the group ArduRover User Group"That's a nice, smooth jump! The suspension just soaked that up no problem. That's what you get for the extra $$ on a good platform. :) I need to retune my suspension to handle the jump or else switch to my Hyper10TT chassis."
Göran Andersson replied to Bot Thoughts's discussion Magnetometer Soft- and Hard-Iron Calibration"It was with great interest I read about the need of having the correct ordering of components in the radii vector.
I am using the method of Yury Petrov's, but don't get the accuracy that been reported by others. The only…"
Bot Thoughts posted a discussion3DR LEA-6 GPS, loses fix w/ mbed connected
I have a 3DR LEA-6-H board losing fix under certain conditions.If I connect to it via FTDI breakout (5V), it easily gets a fix, 8 satellites in the basement. Likewise, when running driver code on an Arduino Pro board (5V), same deal. It gets a fix no problem.However, when I connect it to the baseboard I built for my mbed (supplying power and connecting to gpio pins for data), it loses fix.Figuring on a noisy power supply, I tried running the mbed and GPS on separate power supplies. In that…See More
Bot Thoughts replied to Brett Smith's discussion LSM303DLHC Magnetometer Help! POLOLU IMU"Remind me -- did you calibrate the compass? At least for hard iron offset?
If not, nothing will work."
Bot Thoughts commented on Thomas J Coyle III's group ArduRover User Group"FYI, RedCat Racing, ExceedRC, and a couple of other brands carry some of the same models. Do a bit of research on durability. I have seen folks post that they like RedCat; it's not clear to me if the models are identical or if there are…"
Bot Thoughts commented on Thomas J Coyle III's group ArduRover User Group"@Kabir - to get a "hobby grade" RC vehicle, you will need to spend at least $100. But you can get something good for under $200.
I have an ExceedRC Sunfire 4x4 buggy I got as a used roller for $60. For on road, probably ok. Off-road,…"
Bot Thoughts replied to Thomas J Coyle III's discussion Getting Ready for the Sparkfun 2013 AVC in the group ArduRover User Group"I felt it was best to focus on getting the robot to operate consistently under normal conditions then worry about less likely scenarios later (ie, never ;))
I'm debating what to do, if anything, about avoiding collisions with other…"
Bot Thoughts replied to Thomas J Coyle III's discussion Getting Ready for the Sparkfun 2013 AVC in the group ArduRover User Group"Sigh of relief. The weekend email was a mistake. They got my vid, I'm on the list. Got an email and phone call from Robert C."
Profile Information
- About Me:
- I'm a nerd and as such, I'm interested in robotics, electronics, information security, photography and Full Size Jeeps.
- Tell us a bit about your UAV interest
- Primarily kindled by the Sparkfun AVC. I entered a ground vehicle in 2011 but was curious to play with UAVs.
- Hometown:
- Centennial, CO
Bot Thoughts's Blog
Data Bus mbed baseboards: Tindie Fundraiser
Posted on May 21, 2013 at 2:30pm 0 Comments 4 Likes
Data Bus mbed baseboards are now available on Tindie as a fundraiser! I figured maybe some folks wanted to experiment with their own algorithms and want a head start on their 2014 AVC ground vehicle entry.…
Continue 2013 Sparkfun AVC entry video
Posted on May 8, 2013 at 2:30pm 10 Comments 6 Likes
I put together a short video of Data Bus driving in autonomous mode in the rain. Hopefully I got the video in before the deadline. We'll see...
Data Bus is configured to drive between four waypoints outside my house at a much slower pace than during the 2012 AVC due to the much smaller area and the danger of collision with moving or stationary cars :)
AVC 2013 info has been posted
Posted on March 14, 2013 at 11:42am 32 Comments 9 Likes
Sparkfun has posted rules, walkthrough video, registration for the 2013 AVC.
Both air and ground competitions should be really interesting. The ground course is slightly shorter than previous years, and features fixed, known locations for barrels, the bonus…
Continue The Matternet: A Flying Autonomous Delivery System For The Developing World
Posted on February 12, 2013 at 7:00pm 5 Comments 0 Likes
I was wondering how long it'd be before someone did this... The early stage involves minimal lift capability, but eventually 1000kg -- goods and people.
The MatterNet on…
ContinueComment Wall
- No comments yet!
Social Networking
Top Content
Contests
Season Two of the Trust Time Trial (T3) Contest has now begun. The fourth round is an accuracy round for multicopters, which requires contestants to fly a cube. The deadline is April 14th.A list of all T3 contests is here.
Groups
-
Moderators
24 members
-
Documentation Editors
51 members
-
Agricultural UAVs
133 members
-
ArduCopter User Group
1298 members
-
Telemetry over cellular …
249 members
Advertisement
© 2013 Created by Chris Anderson.
Powered by
