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Gainesville, FL


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Please tell us a bit about your UAV interest

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miami


Activity Feed

john replied to S. Osborne's discussion English channel with (off the shelf, gutted) boat on autopilot.
"I would guess that he would drive over there and pick it up right when it comes ashore since it might get stolen. Especially if it is a big boat."
Sep 9, 2017
john replied to S. Osborne's discussion English channel with (off the shelf, gutted) boat on autopilot.
"Hi Mitch,
Sorry for the late reply. I don't have any experience with autonomous submarines, but always been fascinated by the idea. You could try searching the internet. If you could get the buoyancy just right it might sit just below the surface…"
Sep 8, 2017
john replied to S. Osborne's discussion English channel with (off the shelf, gutted) boat on autopilot.
"Yes I think it is possible if you use like a 48" catamaran with 8s 20,000 mah batteries. Sailing at night or a submarine would probably be safer. Let us know how it works out"
Sep 3, 2017
john posted a discussion
I bought a chinese clone radio and it had a different usb chip that wouldnt work with my smartphone drivers. So i am trying to find a genuine 3dr usb telemetry module or one with a genuine Ftdi chip. It might be difficult with 3dr not selling them…
Dec 18, 2016
john replied to john's discussion Crash when ground station signal was lost and using joystick
"Hi Ben,
At least I am not the only one with this problem. After modifying the events.pde file the autopilot was able to safely take control and land from a loss of ground station radio signal when using a joystick. I made the changes a year ago to…"
Mar 8, 2016
john replied to john's discussion Is it possible to add a 5 watt RF amplifier to a 3DR/Hope radio module?
"Yes, that would be nice. You might have to overpower the other person's transmitter. A 5 watt linear amplifier would probably work for transmitting and you could use a second module for receiving (and two antennas), but it might be worth…"
Dec 28, 2015
john replied to john's discussion Is it possible to add a 5 watt RF amplifier to a 3DR/Hope radio module?
"30km is very good. I don't feel that I need 30km or 60km of range, but I am more concerned about poor reception when flying low near trees or around hills."
Dec 24, 2015
john replied to john's discussion Is it possible to add a 5 watt RF amplifier to a 3DR/Hope radio module?
"You guys are right. It should be MHz. I was typing fast and didn't think about it. I read something on the 3dr radio wiki about a company called Shireen that makes a 900mhz bidirectional amplifier with 12dB transmit gain, and 18dB receive gain that…"
Dec 22, 2015
john replied to john's discussion Is it possible to add a 5 watt RF amplifier to a 3DR/Hope radio module?
"True in most cases, but I have an amateur radio license and I plan on doing it legally like APRS data packets on 440mhz. Amateur handheld transceivers use 440mhz at 5 watts legally and don't interfere with anyone."
Dec 21, 2015
john posted a discussion
I have upgraded to a 1 watt radio, but even with good dipole antennas I am only getting around 800 meters through trees and buildings (much more when up in the air of course). Better antennas may help, but I am considering using more power and 5…
Dec 20, 2015
john replied to Ruoyu Tan's discussion 3dr radio latency when using joystick control via MAVLink
"I don't know the solution, but you may want to try an older Mission Planner on a fast computer and use a fast baud rate like 115kb for usb and air data rates. I have flown arducopter using Mission Planner/Mavlink joystick control and it was a bit…"
Dec 7, 2015
john replied to Nate892's discussion APM 2.6 CRASH, Log files attached
"It is a good idea to test your quad with a new bec or 3dr power module to rule out the voltage issue, but I am not certain that was the cause of the wobbling. I think that it could be the autopilot trying to stabilize the quad while the throttle or…"
Nov 8, 2014
john replied to Nate892's discussion APM 2.6 CRASH, Log files attached
"I had a violent wobbling like you mentioned on a failsafe with v3.2 firmware. It was a gcs failsafe though. I am not sure if the failsafes can cause the same problem, but there was a change to the events.ino file recently that can cause it to…"
Nov 7, 2014
john replied to john's discussion Can 3DR radios be used to build a gps tracker?
"cool. I will try it. The software might require quite a bit of programming work to get a moving map, but hopefully I can modify the APM code to at least get it to display the gps coordinates"
Nov 7, 2014
john posted a discussion
I have a few Mediatek gps modules that I am not using and I would like to build a small gps tracker (not to use on a UAV but something else). The gps trackers that use radios like Garmin dog trackers cost quite a bit. Can I just connect the serial…
Nov 6, 2014
john replied to mack goodman's discussion bec failed - sent 12 volts to input side - can anything be done?
"check the resistance of the 2 fuses. You may have just blown a fuse"
Oct 30, 2014
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