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Activity Feed

joe commented on Nitin Gupta's blog post Releasing NavStik, a Micro Navigation and Control Module
"Thanks for the clarification. I think most guys are using ST-Link/Discovery or Black magic probe for debug.
I looked again at your website. Which RTOS are you using?"
Sep 27, 2012
joe commented on Nitin Gupta's blog post Releasing NavStik, a Micro Navigation and Control Module
"I went to your website but could not find any information about your software. Which RTOS is used? What is your github id?
I think this project is interesting but perhaps a little late to the F4 party, since there is also the option of PX4,…"
Sep 26, 2012
joe commented on Jason's blog post Open-source ESC - is there a potential community?
"Also, for the modular approach: I think the OpenBLDC design files are available to review, but the project lost steam and never invested time in the power stage, relying instead on deconstructing other controllers to use their power stage, not a…"
Aug 16, 2012
joe commented on Jason's blog post Open-source ESC - is there a potential community?
"cool. 
CAN: in response to another post, I also agree CAN is a better bus...but, no ESC's support CAN, so no controllers do, since no controllers support CAN no ESC's do...repeat loop - several controllers now use the F4 and supporting CAN is now a…"
Aug 16, 2012
joe commented on PX4's blog post Introducing the PX4 autopilot system
"Thanks for the clarifications - it's nice to see there's some calibration.
With the static you're freezing your controller for temperature compensation? The VN100, DJI, Autoquad all seem to add a multi axis movement to their dynamic calibrations…"
Aug 7, 2012
joe commented on PX4's blog post Introducing the PX4 autopilot system
"I browsed through the source, but it doesn't seem you're using DMA (?)
I assume the developers are using linux - my personal preference - but the wiki seems to have more info on the APM GCS setup. Will the project focus most of their effort on…"
Aug 6, 2012
joe commented on PX4's blog post Introducing the PX4 autopilot system
"The PX4 flight videos and airframes only show indoor quads where robust state estimation is less critical than say a windy outdoor environment.
1. What does PX4 use for sensor fusion (e.g. Extended KF, Unscented KF)? What Hz does your state…"
Jul 27, 2012
joe commented on Bill Nesbitt's blog post AutoQuad FC fw v6.6
"After reading through the wiki, I can simplify my questions - it'd be nice if it behaved like a real wiki with history so you can see what has changed...
Will the development of the modified versions of the QGroundControl and Android ground stations…"
Jul 9, 2012
joe commented on Bill Nesbitt's blog post AutoQuad ESC32v2
"I already have the Turnigy Dlux ESC's on the way. After I flesh out my prototype I'd prefer to point people to an opensource ESC to build if they wanted to build my project. I don't have much experience routing high power PCB's but I'm willing to…"
Jul 3, 2012
joe commented on Bill Nesbitt's blog post AutoQuad ESC32v2
"Is there anything in your design (schematic or code) that would prevent it from being broken out into two pcb's? I have a 48V diy electric recumbent, and another hobby project I'm working on might be able to use the ESC32 as is - but both would…"
Jun 29, 2012
joe commented on Bill Nesbitt's blog post AutoQuad ESC32v2
"When I worked with a large ESC for an EV motor I noticed the IGBT block was a separate module from the (ST ARM) controller board - presumably so the design was flexible enough to allow different power levels (?). Many third parties produce IGBT…"
Jun 29, 2012
joe commented on Ellison Chan's blog post Good Hobby CNC Machine
"Monroe,
>http://shopmasterusa.com/discount-pricing/
>Real ballscrews and real servos not steppers if you want the good stuff.

Are you saying this machine now has servos? The site indicates a stepper drive.
A friend mentioned the 3in1 machines to me…"
May 26, 2012
joe commented on UAS_Pilot's blog post 40mm retractable camera turret
"adafruit is now selling a slip ring: http://www.adafruit.com/blog/2012/03/12/slip-ring-video/
This is the best price I've found. Ready made slip rings make turrets a lot easier to build.
Aside from the ball, all the parts are easily sourced for diy.…"
Mar 12, 2012
joe commented on Chris Anderson's blog post Francis Fukuyama, DIY Droner
"Very interesting. I read "On the Origins of Political Order" just two months ago. I had a few issues with some of the content and editing - the section on biology has some incorrect statements (e.g. structure of the neocortex) and could have…"
Feb 14, 2012
joe commented on Bill Nesbitt's blog post AutoQuad version 6.1
"Great, look forward to seeing your progress - let me know if you decide to run some extra dev boards.

MPU6000: A mag and pressure sensor can always be added to the carrier for the 6000. I recall your reasoning for sticking with the analog sensors.…"
Jan 13, 2012
joe commented on Bill Nesbitt's blog post AutoQuad version 6.1
"Hi Bill,
Wondered if you started working with the STM32F4 - you mentioned an interest in a previous post with the desire to implement a SPKF in place of the EKF. 
Also, do you still advocate the the VN100 or do you think the MPU6000 would be…"
Jan 12, 2012
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