Bot Thoughts
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  • Littleton, CO
  • United States
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  • Heidi Goeringer
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  • Gary McCray
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  • Scott Harris
  • healthyfatboy
  • robert bouwens
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  • Thomas J Coyle III

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Bot Thoughts's Discussions

3DR LEA-6 GPS, loses fix w/ mbed connected

Started May 16, 2013 0 Replies

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…Continue

Tags: rfi, ublox

For Sale: CHR-6DM AHRS - 300Hz EKF, ARM

Started Apr 4, 2012 0 Replies

I have a CH Robotics 6dm AHRS for sale. Briefly used on a ground vehicle a few…Continue

Tags: chr-6dm, imu, ahrs

Magnetometer Soft- and Hard-Iron Calibration

Started this discussion. Last reply by Yury Matselenak Jun 5. 24 Replies

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

Data Bus was my Sparkfun AVC 2011 ground vehicle entry. Its based around…Continue

Tags: ugv

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Bot Thoughts's Page

Latest Activity

Bot Thoughts replied to Gary McCray's discussion Need RC PWM signal to 0-5 volts for my robot. in the group ArduRover User Group
"If you want tips on how to get an Arduino to read Servo RC, you could look at our Jeep Rover Project's homebrew steering servo code: https://github.com/shimniok/diyrovers/tree/master/JeepServo"
Aug 22
Bot Thoughts commented on Thomas J Coyle III's group ArduRover User Group
"For what it's worth -- @Tom, @RoboBill -- our team, SHARC, was also using a Hemisphere industrial grade GPS on our robot "Troubled Child," possibly the same model (an A100) as 0x27 was the prior two years. I think we can safely say…"
Jun 23
Yury Matselenak replied to Bot Thoughts's discussion Magnetometer Soft- and Hard-Iron Calibration
"Here is the results of the calibration with using my program. Calibrated magnetometer data: "
Jun 5
Yury Matselenak replied to Bot Thoughts's discussion Magnetometer Soft- and Hard-Iron Calibration
"See my version of the soft and hard iron magnetometer calibration: http://diydrones.com/profiles/blogs/advanced-hard-and-soft-iron-magnetometer-calibration-for-dummies"
Jun 4
Bot Thoughts replied to Thomas J Coyle III's discussion Waterproofing your chassis for the AVC in the group ArduRover User Group
"While there's no way to spot a false trigger with only one trigger, I think the point RoboBill was making was that one could use multiple samples to eliminate false positives. Various filtering approaches could do it. Maybe a median filter. Or…"
Jun 1
Bot Thoughts replied to Thomas J Coyle III's discussion Waterproofing your chassis for the AVC in the group ArduRover User Group
"Good advice. Data Bus has survived the rain, quite a bit of it. My electronics are mounted above the battery / frame  on a sheet of Lexan. I use an RC body as well. That turned out to be adequate to keep things reasonably dry. It's a…"
May 31
Bot Thoughts replied to Brett Smith's discussion Magnetometer Tilt Compensation Tutorial + Sensor Analysis
"Ongoing discussion on hard- and soft-iron calibration: http://diydrones.com/forum/topics/magnetometer-soft-and-hard-iron-calibration"
May 19
Bot Thoughts commented on Thomas J Coyle III's group ArduRover User Group
"Sparkfun AVC 2014 Course Preview posted earlier today: https://www.youtube.com/watch?v=5rgl8qSMnCg"
Apr 17
Bot Thoughts commented on Carlos Orozco's blog post RoboNurse
"identifying a user with machine vision is probably going to take too long. I'd suggest scaling back and identifying a QR code as a proof of concept. (Like, maybe scanning a wristband which is how hospitals seem to do it sometimes) You need to…"
Mar 11
Shaun Mcmaster commented on Bot Thoughts's blog post Give All the Robots Eyes to See! OpenMV.
"combine with laser line generator and gyro for a 3D scanner...."
Feb 22
Gary McCray commented on Bot Thoughts's blog post Give All the Robots Eyes to See! OpenMV.
"Here is a link to Blusky1's comparison chart for different micro lens's to give a better idea" http://www.rcgroups.com/forums/showthread.php?t=1835750"
Feb 18
Gary McCray commented on Bot Thoughts's blog post Give All the Robots Eyes to See! OpenMV.
"Hi Bot Thoughts, I don't know if it would be feasible, but the inclusion of one of the small threaded lens mounts like usually come on FPV cameras would actually greatly broaden the cameras applications. It would permit you to adjust the…"
Feb 18
Bot Thoughts commented on Stephen Buck's blog post Colorado's High Peaks - Mt. Bierstadt
"Can't offer help on a flight plan but I do live in Denver area so it's great to see this. Most of my outings in the mountains have been on 4wd trails with my Jeep. The highest being in Ouray area on Imogene Pass. That whole area has ready…"
Feb 18
Bot Thoughts commented on Bot Thoughts's blog post Give All the Robots Eyes to See! OpenMV.
"@healthyfatboy : great! I have a Pixy on the way myself :)  We'd love to have you join the Google group to talk more if you haven't done so. @Gary McCray, same, would love to have you join…"
Feb 18
healthyfatboy commented on Bot Thoughts's blog post Give All the Robots Eyes to See! OpenMV.
"Excellent! I'm looking forward to getting my Pixy soon but I would love to have another camera I could mess around with and will definitely be supporting you when you go on Kickstarter. The points Gary makes are great about lens changes and…"
Feb 18
Gary McCray commented on Bot Thoughts's blog post Give All the Robots Eyes to See! OpenMV.
"Seems a very good concept, I wish you well and look forward to seeing your Kickstarter launch. Having different camera options seems a good idea. You might consider near IR or even optical bandpass filter capability. Possibly just strip built in IR…"
Feb 17

Profile Information

About Me:
I'm a nerd and as such, I'm interested in robotics, electronics, information security, photography and Full Size Jeeps.
Please 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

Give All the Robots Eyes to See! OpenMV.

Posted on February 17, 2014 at 9:17am 12 Comments

The OpenMV camera module will be the lowest cost, most hackable machine vision platform out there, because Ibrahim,…

Continue

Tindie Cyber Monday Sale

Posted on December 2, 2013 at 1:43pm 0 Comments

RoverMux R/C multiplexer is on sale for only $6 (buy here, coupon code EB024FC) on Tindie

There are 100+ additional items from many other makers on sale at Tinde today.…

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3CH RC (Servo) Multiplexer for Robot Rover - on Tindie

Posted on August 27, 2013 at 9:00am 1 Comment

Anyone else building an autonomous rover perhaps for Robomagellan or Sparkfun AVC? Do you have a multiplexer on your one-off, scratch built autopilot solution? If not, I built something just for us. :)

Picture your robot driving right at a curb or a wall. No problem, just take over with an RC multiplexer installed. It's…

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Sharp Distance Sensors with I2C

Posted on August 22, 2013 at 11:00am 16 Comments

For my own rover, Data Bus, I've been working on a board that converts Sharp range sensors to I2C.

I ran out of analog ports and had to prototype an I2C solution for my obstacle detection. I have this problem on all my robots. Pokey has too few analog ports. And I want to run a few of these on my RPi tele-rover.

They'll work with any Sharp…

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