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Male


Location

Sierra Madre, CA


About Me:

Electrical Engineer working for NASA


Please tell us a bit about your UAV interest

Building Autocopter


Activity Feed

Lloyd DeForrest replied to Randy's discussion ArduCopter 2.9 / 2.9.1 released
"Hi All. I flew a 3 WP test mission today twice. The first time it performed flawlessly except for the last 6 feet of the landing were very fast. The second test run again performed flawlessly except for the last 6 feet, where it was like the motors…"
Feb 10, 2013
Lloyd DeForrest left a comment on ArduRover User Group
"Linus,
Like everything new and undocumented, I'm a little confused.  I couldn't find in APM_Config.h the normal hardware board directive: 
#define CONFIG_APM_HARDWARE APM_HARDWARE_APM2
And I couldn't find the new:
#define CONFIG_HAL_BOARD   …"
Jan 8, 2013
Lloyd DeForrest left a comment on ArduRover User Group
"Linus.  That worked  Thanks!
I guess this new "HAL Board" handling is new?  Is that why we need a modified version of the IDE now?
Thanks again.
Lloyd
 "
Jan 8, 2013
Lloyd DeForrest left a comment on ArduRover User Group
"Thomas,
I have been unable to compile ArduRover v230 firmware.zip using the Arduino IDE 1.0.3.  ArduRover v220 firmware compiles just fine.   Is there a trick to compiling ths version?
Thanks!"
Jan 7, 2013
Lloyd DeForrest replied to Hugues's discussion Power for analog pins (servos for roll/tilt, sonar, etc)
"Hugues,
I power the camera stabilization servos from a separate ESC - APM is pwered, like you, from the 3DR power module.  I also filter the +5v with a 50 uf and a .1 uf cap for good measure., but you probably don't need to.  Not worrying about…"
Dec 27, 2012
Lloyd DeForrest replied to Brian Sigmon's discussion Coper LEDS low voltage does this feature work?
"Brian,
I wasted a lot of hours on this one.  I even wrote my own low voltage detect logic and added it to the LED code.  Then one day, just couldn't stand it and found the answer staring me in the face.
 
In config.h,   BATTERY_EVENT  is…"
Dec 20, 2012
Lloyd DeForrest replied to Frank giglio's discussion External Magetometer
"I figured it out and wrote up a brief how-to in the last post in this thread:
http://diydrones.com/forum/topics/help-compass-deviates-with-increa...
Let me know i you have any questions."
Dec 16, 2012
Lloyd DeForrest posted a discussion
Now that my loiter performance is rock solid using AC 2.8.1, I’ve moved onto flying missions.  So far, only about 40% of mission sorties are a success. My basic mission is 1) takeoff, 2) Delay, 3) Time Loiter at new location for 5 seconds, 4) …
Dec 16, 2012
Lloyd DeForrest replied to Lloyd DeForrest's discussion Help- Compass deviates with increased motor current
"Just wanted to tie off this thread for the benefit of others.
After mounting an external compass to the top plate of my quad and performing a few other magnetic interference reducing steps, my quad now fly’s perfectly.  No more compass interference…"
Nov 23, 2012
Lloyd DeForrest replied to Lloyd DeForrest's discussion Help- Compass deviates with increased motor current
"Success - sort of.
Well, I learned what everyone knew.  I relocated an external 3DR magnetometer to the top plate of the 3DR frame using the APM 2.5’s external I2C connector and it works great (no surprise).  No compass deviation with full throttle…"
Nov 12, 2012
Lloyd DeForrest replied to Lloyd DeForrest's discussion Help- Compass deviates with increased motor current
"No ideas? 
I'm troubleshooting this problem and would like to use the CLI compass test while the motors are running.  Has anyone done this?
Other than that, I'm at a loss as to why my compass deviates with increased motor current.  I'm using all 3DR…"
Oct 25, 2012
Lloyd DeForrest posted a discussion
My compass decreases its reading as much as 90 degress with take-off motor power (high current).  It does this both on an APM 2.5 and an APM1 board.  I've moved the APM board to the secnd deck in the stack and the deviation is only 10 degress, but…
Oct 21, 2012
Lloyd DeForrest commented on Grips's blog post The Wild ROVer..
"Grips,
Nice truck!  I'm doing something very similar but am adding a Arduino mega and an xbee onboard the truck to simulate the RX inputs to the APM1.  I hacked an old truck TX with an Arduino chip and an XBee and a custom built telemetry protocol.…"
Sep 4, 2012
Lloyd DeForrest replied to Andreas M. Antonopoulos's discussion ArduCopter 2.7.1 Released
"Wooa.  The 2.7.2b Camera Mount configuration has changed drastically.  Parameters have been renamed and new fucntions added to mission planner.    Can I get some hints on how to make it work?  My camera mount used to work great in 2.5, not so great…"
Aug 25, 2012
Lloyd DeForrest replied to Lloyd DeForrest's discussion Cannot use a MinimSD and a 3DR radio in 2.7.1 (worked under 2.5.5 - Mavlink .9)
"Just fgured this out and am posting in case someone else has the issue.  On an APM1 with both 3DR radio and MinimOSD connected all looks OK but no telemetry is displayed.  Here is my error in thinking and what I did to get it to work.
You must first…"
Aug 19, 2012
Lloyd DeForrest replied to Chad Frazer's discussion No telemetry but good display...
"Hi Everyone - I had this exact same issue on an APM1 with both 3DR radio and MinimOSD connected.  All looks OK but no telemetry is displayed.
This may not be your problem, but here is my error in thinking and what I did to get it to work.
You must…"
Aug 19, 2012
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