Thomas Butler
  • Rockford, IL
  • United States
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Latest Activity

Thomas Butler commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"@Tom, I think I can speak for everyone listening in and commenting on this thread that your participation is excellent. It is rare that a person working at a component manufacturer ever gets involved in this sort of dialog. Thanks for being in the…"
yesterday
Thomas Butler commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"@Chris, while I have your attention, how about upgrading this arcane forum software used by DIYDrones. At least, add the ability to print ALL of the posts for a thread (very common on the majority of forums today) so we don;t have to wade through…"
Sunday
Thomas Butler commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"@Tom HW specifies at room temperature too as do most vendors, and most vendors (Invensense,et al) have a "percent sensitivity change vs temperature" error correction; same difference as HW's stated value at operating…"
Sunday
Thomas Butler commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"@Rafael, The difference is one is an AHRS IMU and the other are discrete sensors.. Regarding Pixhawk vs HGxxxx the difference is one is a purpose built AHRS IMU device; the Honeywell IMU, The other (Pixhawk,et al) is a controller that does its own…"
Friday
Thomas Butler commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
""one of the reasons that the Pixhawk autopilot has been so successful has been the remarkably low noise level of the MPU6000s." ...  Well probably actually because the software/hardware is adequate to do the job and is CHEAP at <…"
Thursday
Thomas Butler commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"Like Windows Vista the MPU9250 is obsolete as is the Pixhawk. Try using a mainstream Pixhawk clone and/or controller with a sensor of today such as the ICM-20602; The best made at this time by Invensense (even though they have "newer"…"
Wednesday
Thomas Butler commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
""Inaccurate" or lower resolution! Should not confuse accuracy and resolution.  A >$ does not mean better. How much "accuracy" (really meaning resolution) is needed? A cruise missile on track to hit through a bedroom…"
Wednesday
Thomas Butler commented on Jay Parikh's blog post Wireless Broadband Solutions for Unmanned Aerial Systems
"FAA mandated RF Kill switch is stated in numerous places. However, to stay in context just look at the "Solution Note" for which there is a link in this blog post; an attribute of the Doodle Labs products is "Hardware “RF…"
Jan 26
Thomas Butler replied to Nelson Hom's discussion I want to send fpv live feed video to phones.
"See my response to a post about MIMO video streaming on DIYDrones here There WiFi modules take an HD video input. Costs vary widely depending on grade of the electronics."
Jan 25
Thomas Butler commented on Simon D. Levy's blog post Hackhawk II: An Arduino-compatible brushless flight controller
"The MPU9250 is obsolete as is the integral AK8963 mag; has been for quite some time!. You might want to take a look at Pesky's latest here. They acknowledge the limitations of the proprietary Swiss EL7180 CPU (10mhz CPU) (in addition to…"
Jan 19
Thomas Butler commented on Jay Parikh's blog post Wireless Broadband Solutions for Unmanned Aerial Systems
"Hate these blatant advertisement posts with virtually no application information. After all, this is Do-It-Yourself-Drones. FYI MIMO means Multiple Input Multiple Output. I.e., can transmit/receive on three channels (streams) concurrently. From what…"
Jan 18
Thomas Butler replied to Andy Baker's discussion Running 2 'identical' batteries in parallel
"same topic at this DIYDrones page!"
Jan 17
Thomas Butler replied to Windjimes's discussion Dual System Redundant Supply Parallel Question
"Yeah. the use of diodes for this is arcane; even multiplexing 5V power inputs as in the PixHawk. Note that if the diodes are properly rated, they won't "burn". Simply put, simple use of a few of today's high power, low cost…"
Jan 17
Thomas Butler commented on Rachael Murphey's blog post 4 Secrets to Keeping Your Drone in Great Condition
"Oh yaawwwnnn,so awfully generic! Substitute the word "drone" for "anything"..yes, the word "anything"...ha!."
Jan 15
Thomas Butler replied to DR WHO's discussion pixhawks DEAD don't buy
"Well here is a teaser (you are the first to see it here): New TBT-AV1 flight controller compatible with ArduPilot/ArduCopter to be released in 2019. Three years in development. Uses Microchip/Atmel SAM E70 300mhz 2MB microcontroller. Multiple…"
Jan 11
Thomas Butler replied to DR WHO's discussion pixhawks DEAD don't buy
"hey Jed, ...mainstream product IN PRODUCTION that YOU would actually use to control your drone/SUAV. No doubt there are dozens of obsolete flight controller designs created in the USA...I  designed one in 2010 using three ... yada…"
Jan 11

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engineer
Hometown:
Rockford, Illinois

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