Matthew Smith
  • Male
  • Bethesda, MD
  • United States
Share Twitter
  • Blog Posts
  • Discussions (5)
  • Groups
  • Photos
  • Photo Albums
  • Videos

Matthew Smith's Discussions

Inconsistency in GPS coordinates between firmwares

Started this discussion. Last reply by Matthew Smith Nov 10, 2011. 2 Replies

All,Our team has noticed some GPS inconsistencies between firmware versions 2.048 and 2.049. We had issues completing missions using 2.049. Before the upgrade, we were completing missions at 2meter…Continue

Tags: 2.048, 2.049, NG, GPS

<12volt Camera in US?

Started this discussion. Last reply by Jose Angel Oct 14, 2011. 8 Replies

Hey All, We are building a quadrotor and want to add streaming cameras to the bird. We are currently using 11.1v LiPo batteries and can't have a 12v camera. We have seen the readymaderc ones that are…Continue

 

Matthew Smith's Page

Latest Activity

Matthew Smith replied to Matthew Smith's discussion Inconsistency in GPS coordinates between firmwares
"Steve,   We were seeing almost the exact same thing. We are using the GPTA010 unit that ships with the Arducopter. We will provide log information to the wiki later today to help resolve the issue if there is in fact an issue. If you could…"
Nov 10, 2011
Steve Smetters replied to Matthew Smith's discussion Inconsistency in GPS coordinates between firmwares
"Hmmm... funny you should ask. I have noticed shifting in my coordinates as well (weird stuff like my Google Earth plots show me a bit north of where I know I was) and ordered a new gps this week from the DIYStore so I could compare the two…"
Nov 10, 2011
Matthew Smith posted a discussion

Inconsistency in GPS coordinates between firmwares

All,Our team has noticed some GPS inconsistencies between firmware versions 2.048 and 2.049. We had issues completing missions using 2.049. Before the upgrade, we were completing missions at 2meter accuracy with tight turns and fast speeds. We were also getting visual confirmation of the waypoints being captured using APM. After the upgrade, we began noticing some drift in our missions. While the missions were being flown in approximate patterns, the coordinates were not being visually…See More
Nov 10, 2011
Matthew Smith replied to Farooq Niaz's discussion Sonar Calculation help required
"I am working with Riley. Using the same sonar unit as Farooq we attained these measurements for our sensor: Actual distance Reported Distance Ratio 34cm 47cm 1.38 62cm 88cm 1.41 94cm 134cm 1.42 117cm 164cm 1.40 (excuse my abuse of significant…"
Oct 17, 2011
Jose Angel replied to Matthew Smith's discussion <12volt Camera in US?
"Thanks Don, really useful links!  "
Oct 14, 2011
Don Cramer replied to Matthew Smith's discussion <12volt Camera in US?
"Sure.. When you power your video tx/cam on the same battery used to power the esc's/motors you will likely get video noise from the ESC's that varies with the speed of the motors.   Here are a few links of samples of what people are…"
Oct 14, 2011
Jose Angel replied to Matthew Smith's discussion <12volt Camera in US?
"Don, could you elaborate a bit more on the LC filter.... I'm a completely noob in the electronics world :)"
Oct 13, 2011
Don Cramer replied to Matthew Smith's discussion <12volt Camera in US?
"The 12v video tx and cameras from readymaderc work fine running off a 3s lipo flight pack with zero regulation. That is how my FPV tri's are setup with no problems. The only thing you will need to do is put an LC filter on the power line to the…"
Oct 13, 2011
Gérard Charlon replied to Matthew Smith's discussion <12volt Camera in US?
"You could feed a 12V camera from a 11.1V Lipo battery by using a switch regulator, such as DE-SWADJ3, from Dimension Engineering."
Oct 13, 2011

Moderator
Michael Pursifull replied to Matthew Smith's discussion <12volt Camera in US?
"Well, most camera and transmitters need to do about the same amount of work, and most transmitters are designed for a certain amount of power output. So a camera and transmitter designed to run at 12v is going to have a lower current draw than one…"
Oct 13, 2011
Matthew Smith replied to Matthew Smith's discussion <12volt Camera in US?
"Thanks for the quick reply!    We understand that we will have to regulate the power, no biggie. However, we are already drawing some serious amps with 4 x 25amp motors. We want the bird to last as long as possible and the camera will be…"
Oct 13, 2011

Moderator
Michael Pursifull replied to Matthew Smith's discussion <12volt Camera in US?
"You know that your lipo usually puts out 12.6 - 11.1v, right? And that you will most likely need to regulate the power, because if you tap directly into your flight power, it will be jumping all over the place anyways from the draw from the…"
Oct 13, 2011
Matthew Smith posted a discussion

<12volt Camera in US?

Hey All, We are building a quadrotor and want to add streaming cameras to the bird. We are currently using 11.1v LiPo batteries and can't have a 12v camera. We have seen the readymaderc ones that are 12v and they look great, but we don't want to add any more weight to the system and our current power supply just wont cut it. Does anybody have a suggestion for a 5v camera that we can get stateside? Most of the solutions come China and are illegal due to the channel frequencies allowed.  Thanks!See More
Oct 13, 2011

Profile Information

About Me:
Software engineer from DC
Please tell us a bit about your UAV interest
Working on them for work.
Hometown:
Charlottesville

Comment Wall

  • No comments yet!

You need to be a member of DIY Drones to add comments!

Join DIY Drones

 
 
 

© 2014   Created by Chris Anderson.   Powered by

Badges  |  Report an Issue  |  Terms of Service