"Data Bus and I can't wait! See ya all there."
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Bot Thoughts
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Bot Thoughts's Discussions
For Sale: CHR-6DM AHRS - 300Hz EKF, ARM
Started Apr 4 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 dmohankkvr Apr 17. 6 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
What UGV Ground Control Station do you use?
Started Sep 19, 2011 0 Replies 0 Likes
What ground control station do you use for your unmanned/autonomous ground vehicle? What customizations have you made? Reason I ask... I am contemplating a GCS for Data Bus my Sparkfun AVC entry.…Continue
Bot Thoughts's Page
Latest Activity
Bot Thoughts commented on Chris Anderson's blog post Just one month to go before the Sparkfun AVC (and the DIY Drones multicopter rodeo!)Bot Thoughts replied to Zul Azfar Ahmam's discussion NMEA protocol"From the DIY Drones MTK3229 product page:
"
Bot Thoughts replied to Rick Eis's discussion MiniGPS"If you look at the product page you will have your answer:
"Note that the new MediaTek has custom and exclusive "DIYDrones" firmware that allows the unit to output an efficient and very compressed binary protocol (This firmware will…"
Bot Thoughts replied to Rick Eis's discussion MiniGPS"I thought the DIYdrones version transmitted a binary protocol unique to DIYdrones? If so, I don't see how MiniGPS could work; it was designed to support the standard protocols found on every other MTK3229. I don't know if it's…"
Bot Thoughts replied to Zul Azfar Ahmam's discussion NMEA protocol"Look at the MTK3229 datasheet/manual for the command to send to tell the GPS to send output in NMEA instead of Binary. This particular chip of yours may be the DIY Drones one and I don't know if it can output NMEA or not. I know that the…"
Bot Thoughts replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?"Ok... umm... wow, I've looked at SO much. Let's see.... oh, here's a great tutorial on digital signal processing. http://www.dspguide.com/pdfbook.htm Very easy to understand.
Some commonly suggested papers for Kalman…"
Bot Thoughts replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?"If you haven't yet, carefully study the algorithms and approaches of other autopilot AHRSs which faced and dealt with the gyro/accel noise issue -- as well as many subsequent issues.
I suggest starting with MatrixPilot since it is well…"
Bot Thoughts replied to Sean Wagner's discussion Optical Flow Sensor - standalone - register reads"I'll have to remind myself about the code, but maybe I can try to duplicate the problem..."
dmohankkvr replied to Bot Thoughts's discussion Magnetometer Soft- and Hard-Iron Calibration"I have just started working on to calibrate my magnetometer. I used magnetometer for my heading correction using extended kalman filter. I see that the errors are coming to around 20 deg, and I am very unhappy with this large errors. I considered…"
Bot Thoughts replied to Crispin's discussion 20Hz GPS"I'm pretty pleased with the accuracy/performance so far."
Bot Thoughts posted a discussionFor Sale: CHR-6DM
I have a CH Robotics 6dm AHRS for sale. Briefly used on a ground vehicle a few times and always inside an enclosure.The board is currently mounted to the enclosure with poster putty and includes a power indicator LED and 4-pin 0.1" connector with about 1' of wire.I can desolder everything and just send the raw board, too, if you want."This IMU from CH Robotics is an Attitude…See More
Bot Thoughts replied to Crispin's discussion 20Hz GPS"Just bought one of these... the main reason was a hope that higher update rates would result in improved position and heading estimation for my autonomous ground vehicle. Curious to hear what others have to say. "
Bot Thoughts replied to Sean Wagner's discussion Compiling Optical Flow Sensor example sketch"Awesome!!"
Bot Thoughts replied to Riccardo Kuebler's discussion Geomagnetism reversal coming soon ? Will magnetometers still be useful ?"Maybe this is why I'm having such a hard time calibrating my magnetometers :)
I found another viewpoint after a few minutes of searching.
http://www.universetoday.com/18977/2012-no-geomagnetic-reversal/"
Bot Thoughts replied to Sean Wagner's discussion Compiling Optical Flow Sensor example sketch"Ah, just as I suspected. Ok, look at AP_DCM.h -- that's not C code, it's XML / HTML. Rename it to .html and open in your browser. You'll see what I mean.
When you browse code in Google Code repositories -- and I've done…"
Bot Thoughts replied to Sean Wagner's discussion Compiling Optical Flow Sensor example sketch"Wow, lookit all those errors. :)
For giggles can you attach AP_DCM.h as well as AP_OpticalFlow_test.cpp ? I want to be sure it's not corrupted in some fashion.
All those are pretty weird errors and smells like a file that is…"
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
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Contests
Season Two of the Trust Time Trial (T3) Contest has now begun. The third round was a reliablilty/aerial photography round for both planes and copters, which is now closed. Stay tuned for the next round, beginning soon.A list of all T3 contests is here.
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