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About Me:

Systems Engineer


Please tell us a bit about your UAV interest

Investigating multicopters


Activity Feed

swordfishBob commented on healthyfatboy's blog post Ground Based OSD
"If you have it at the ground, you can also overlay ODS onto ground-based video (e.g. if you have a pair of camcorders - one for video capture and the other to record combined video stream)."
Mar 24, 2012
swordfishBob commented on Joel's blog post Dutch engineer is the first man in history to fly like a bird with self- built wings
"Flapping wings depend on body inertia to facilitate the "up" stroke. I like the comment about ducks. I expect there's a reason why we don't have flying birds the size of elephants. Scaling up from "bird size" is problematic. Some aspects will…"
Mar 21, 2012
swordfishBob replied to Cody O.'s discussion Switching from Serial to Ethernet
"You'll find everything goes through the MAVLink library, but that in turn calls user-supplied functions to actually send to serial port using the FastSerial library.  MAVLink facilitates "channels" which are virtual links rather than directly coding…"
Mar 8, 2012
swordfishBob commented on Gary Mortimer's blog post Someone stole these guys pole
"50m. 10kg + 9kg payload. I don't want to be under it."
Feb 24, 2012
swordfishBob posted a blog post
as reported in this Makezine article,"The clever designers at Chicago’s Tanagram adapted code developed to recognize those little black-and-white augmented-reality markers..."I'm thinking a smaller marker, ArduEye, and automated landing for…
Feb 16, 2012
swordfishBob replied to Hu Teng Zhou's discussion Mediatek 3329 gps + Arduino Duemilanove?
"You could use SoftwareSerial http://arduino.cc/hu/Tutorial/SoftwareSerial
Rather than using an on-chip UART, it processes serial comms entirely in software, one bit at a time."
Jan 11, 2012
swordfishBob replied to Squalish's discussion Two Questions on Better Precision GPS
"Great info from Pbreed.
RTK takes a bit of processing. Using a NovAtel or similar gives you a separate processor dedicated to the purpose. It costs, but you're paying for both hardware and software capability.
RTK involves phase-locked tracking.…"
Dec 11, 2011
swordfishBob replied to Kur's discussion ArduPilot Mega Dimensions - Updated
"The pin spacings for the headers are all 0.1", including the gaps between the headers. So, just count the dots.
Or, in Eagle, there's a constant display of the cursor co-ordinates (I think). The origin is one corner of the board, so move the cursor…"
Dec 11, 2011
swordfishBob commented on Jordi Muñoz's blog post Please welcome ArduPilotMega 2.0!
"Nice design.
Jordi, can you pls confirm that the 12 analogs follow the same pinout convention as the Input+Outputs, with 0v at edge of board, +v as 2nd row, and signal pins in the 3rd row from the edge?"
Dec 4, 2011
swordfishBob commented on Anis Nielsen's blog post Suicide mission ;-)
"Grips makes a good point, but by the same token the community probably needs occasional reminders to diligently manage such risks."
Nov 4, 2011
swordfishBob replied to Robert Beatty's discussion MTK GPS using NewSoftSerial.h
"I've adapted the current AP_GPS libraries to work with Serial2 and Serial3 on Arduino Mega; that wasn't hard. They do use FastSerial and BetterStream which would hinder change to a software serial.
The guts of what you need is:
- send initialisation…"
Sep 29, 2011
swordfishBob commented on Seth King's blog post Open Rover
"Gotta laugh.. video about a rover finishing with a dog in the frame. Also, my dad's lawnmower is a Rover."
Sep 22, 2011
swordfishBob commented on Gian Carlo M.'s blog post Homemade Lifesize Chinese "Octocopter"
"Operational note #1: When "arming", be careful it doesn't lead to "dis-arming"."
Sep 2, 2011
swordfishBob commented on Troy Reabe's blog post Cool FPV setup.
"What's more "real" than video overlay?  Seeing the onboard instruments (well, instrument) in the FPV.."
Aug 30, 2011
swordfishBob replied to frederick conner's discussion Remote video in paintball applications.
"If you want penetration where there are obstacles and/or moisture (leaves, trees), go lower frequency than standard WiFi (2.4GHz). If you really want WiFi, look at Ubiquiti's gear. They have some in 900MHz band."
Aug 11, 2011
swordfishBob commented on Geoffrey L. Barrows's blog post Kicking off two open source optical flow / vision sensor projects (Finally!)
"I've seen discussion on optical flow for measuring speed; how about targeting? To address variations in GPS location, a specially marked helipad could be recognised visually, for high-precision landings. Anyone up for this?"
Aug 10, 2011
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