Johann Van Niekerk
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  • Gauteng
  • South Africa
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Johann Van Niekerk's Discussions

Unexplained crash with 2.74b , need help

Started this discussion. Last reply by Greg Fletcher Sep 15, 2013. 13 Replies

Hey GuysJust came back from flying field after a bad unexplained crash. it was a new flying wing airframe and started this morning by following the manual on roll/pitch and yaw tuning.  First of we calibrated the Baro meter to report 0 meters on the…Continue

Tags: crash, 2.74b

Generic Waypoint Missions

Started this discussion. Last reply by Johann Van Niekerk Sep 1, 2013. 4 Replies

Hi GuysI have a development request but would like to see if the development would be useful to others as well.Basic Idea is just to be able to plan a mission with your own custom  3 parameter waypoints.X,YZ axilso in other words when planning a…Continue

APM 2.0 Died overnight! Flased both Mega2560 and PPM encoder and still dead !!!

Started this discussion. Last reply by Tvixen Jul 12, 2013. 7 Replies

Hi Guys. Just a requiste if someone else has encountered this. last week saterday I flew my APM 2 in a plane all was fine, and today I tried updating firmware and it did not work anymore over USB when clicking on the firmware of my choice, (acro) it…Continue

Tags: Firmware, flashing, working, not, APM2

APM 2.5 and 3DR power module failure.

Started this discussion. Last reply by Mark Swift Jan 27. 87 Replies

Hi guysRecently A friend Louis and I bought a complete APM 2.5 setup for x8 flying wingsAPM 2.53Dr radio 433 MHzUblox / Mediatek GPSAirspeed sensorAnd the 3DR power module , we completed our setup and started testing the configuration for elevon…Continue

Tags: module, power, 3DR

Ublox LEA 5H module still working with current APM 2.5 ?

Started this discussion. Last reply by Johann Van Niekerk Dec 25, 2012. 1 Reply

Hi I was wondering if there is still someone that is using there old Ublox 5 GPS ? My GPS was not used for a few months and after trying to test it the other day it did not want to lock . I trying in u-center to upgrade the firmware , tried FW 5.0 ,…Continue

MediaTek GPS with DIYD Adapter board interfaced with Arduino UNO?

Started this discussion. Last reply by Rick Eis May 4, 2012. 2 Replies

HI GuysIv been through the search tab countless times and can seem to find anyone that succesfully interfaced the MediaTek GPS with a UNO before . So im asking Has anyone got the DIYD mediatek GPS working with UNO?Must the Enable pin be pulled high…Continue

Frustrating compilation Errors

Started this discussion. Last reply by Tom in NOVA Mar 3, 2012. 2 Replies

Guys Iv seen a few people that is haveing trouble compiling the ArduPlane and ArduCopter code with Arduino 22 relax , Arduino 100 relax . always seems to be ether"bootlean not declared" or "AP_int16 not name a type " Any of one that got this working…Continue

WIKI setting prop direction page is wrong , recheck your prop directions dont just swap the props

Started this discussion. Last reply by Dave Feb 19, 2012. 3 Replies

this page at the bottum , the sown why creates the opisite direction of what is shownhttp://code.google.com/p/arducopter/wiki/AC2_Props_2Continue

Adding a Hall sensor to brushless motors ?

Started this discussion. Last reply by Dusty Starbucks Feb 4, 2012. 5 Replies

Hi Guys .I found this video. and I was wondering isnt  there any use in adding hall sensors to the motors on your copter to give feedback to the controller of how fast each motor is spinning ? this would make fualt finding on underperforming…Continue

APM 1280 board Redundant ? or just undiscovered for secondary use!

Started this discussion. Last reply by Euan Ramsay Dec 5, 2013. 9 Replies

Hi guys as many of you, after upgrading im sitting with a 1280 APM board still a perfectley good board. shouldnt we try and find a secondary use for it . like camera scypt . gimbal stabilization , pan tilt contoller for FPV flights ? what other…Continue

 

Johann Van Niekerk's Page

Latest Activity

Lorenzo commented on Johann Van Niekerk's blog post Lipos go BOOOM
"I'm new at this and I am working on getting a Y config drone going.  I am about to buy some Zippy 4000mah 4Cell batteries and I am NOW more than a little nervous about charging them and even storing them in my 4th floor condo, where I…"
Jul 7
Christo Swart commented on Johann Van Niekerk's blog post Uhebe is here
"Johan, Louis van Niekerk beweer hy het jou aandele in Uhebe uitgekoop en jy is nie meer betrokke nie. Wie is nou in beheer van Uhebe?"
Jun 9
Mark Swift replied to Johann Van Niekerk's discussion APM 2.5 and 3DR power module failure.
"Hello Bill, I'm also experiencing some problems with my power module (I think), could you take a look at my post and offer any advice? Many thanks for any…"
Jan 27
Euan Ramsay replied to Johann Van Niekerk's discussion APM 1280 board Redundant ? or just undiscovered for secondary use!
"Lego mindstorm controller."
Dec 5, 2013
Hansaka Perera replied to Johann Van Niekerk's discussion APM 1280 board Redundant ? or just undiscovered for secondary use!
"by any chance do you have the firmware file with you that ran on that board?"
Dec 5, 2013
Greg Fletcher replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"No, the reason for nonzero air speed readings on the ground is you are reading the wind speed if your plane is facing into the wind while sitting on the ground. Yes you are into the noise level, but wind is airspeed even if your sitting still. "
Sep 15, 2013
Søren Kuula replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"Hi, I think nobody else wrote this (here): A not quite zero airspeed reading while the plane is stationary is okay. It just has to agree with groundspeed at flight speeds and at no wind. The reason for the nonzero readings is that the airspeed is…"
Sep 15, 2013

Developer
Andrew Tridgell replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"Hi Johann, That isn't version 2.74b, it looks like version 2.73. yep, that was indeed the main issue. The smallest reasonable ARSPD_RATIO is 1.0. It means the airspeed was reading completely wrong and you're plane didn't really stand…"
Sep 15, 2013
Greg Fletcher replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"Johann, You were right in your theory about the air speed  cal being wrong. From your own words you set the airspeed ratio to get zero on the ground. You need to re read the instructions.  I didn't plot any graphs, just played back…"
Sep 15, 2013
Pieter replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"I am not much of a programmer so I cannot help you with the logic.What happened does not qualify as a flyaway, but rather a loss of control. The APM made attitude adjustments based on incorrect airspeed data, and that resulted in a crash. Control…"
Sep 15, 2013
Johann Van Niekerk replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"Hi Pieter Thank you for confirming the issue , we did look at how to adjust the airspeed ratio but after changing the value by the recommended amount and seeing no change we assumed more would be required. Plus to add to the issue we did the pre…"
Sep 15, 2013
Pieter replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"Thank you I have seen enough.You were right in your initial assumption, your airspeed measurement is completely screwed over, so to say. GPS speed sits around 18 m/s and airspeed stays at 3 m/s, whether the plane is moving or on the ground. First…"
Sep 15, 2013
Louis replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"Never mind I think I have it now"
Sep 15, 2013
Louis replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"Pieter please explain how and i will do it"
Sep 15, 2013
Pieter replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"dataflash logs have a .log extension, and they are extracted through CLI"
Sep 15, 2013
Louis replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"Johan, Pieter Here are the two logs on the flash that i can see in the same time our fly way / crash happend. If it is not the correct one please tell me and i will look for the correct ones"
Sep 15, 2013
Johann Van Niekerk replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"hi Pieter no I dont have a dataflash log.only pulled the Tlog everything was bit of a rush can i still download the dataflash log  form the APM ?"
Sep 15, 2013
Pieter replied to Johann Van Niekerk's discussion Unexplained crash with 2.74b , need help
"The thing is.. in the params I extracted from your log the airspeed ratio is 1.9936..Do you have a dataflash log? The telemetry log graph in missionplanner is a PITA to work with."
Sep 15, 2013
Johann Van Niekerk posted a discussion

Unexplained crash with 2.74b , need help

Hey GuysJust came back from flying field after a bad unexplained crash. it was a new flying wing airframe and started this morning by following the manual on roll/pitch and yaw tuning.  First of we calibrated the Baro meter to report 0 meters on the ground and then we calibrated the airspeed sensor. What was strange was that we had to lower the airspeed ratio to 0.1 to get the airspeed sensor to report 0 ms a sec. ( my main opinion for the crash)We proceeded with the first test fly by wire A to…See More
Sep 15, 2013
Johann Van Niekerk commented on Johann Van Niekerk's blog post Uhebe is here
"Hi Andries Ja ek het dit gekyk en ook snaaks gefind, Maar aan die ander Kant na n Nader kyk aan die copter wat hulle gebruik het kan ek nie sien hoe hulle hom wil gebruik nie, ek ken die frame , die motors controllers en flight duration is nie in…"
Sep 3, 2013

Profile Information

About Me:
Electrical Technician, A lot of expierance with Camera's and hardware setups and configuration in small spaces.
Please tell us a bit about your UAV interest
Aerial Photography for Research and mapping , would also like to build a truley APM inspired airframe.


http://groups.google.com/group/gautengsa
bambum0125@gmail.com
Hometown:
Johannesburg SA

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Johann Van Niekerk's Blog

Uhebe is here

Posted on September 1, 2013 at 11:30pm 11 Comments

Uhebe UAV is from South Africa for South African's





In recent history the worlds focus has turned onto the illegal trade of African Rhino horn and for what fable's belief to be medicinal properties (proven hog wash!).



As result a lot…

Continue

APM home made vibration reducing methods useless ?

Posted on November 26, 2011 at 1:00pm 76 Comments

Hi guys after some extensive testing trying to see which way is the best to reduce vibration reaching the APM I am left to be lieve corrected in saying all efforts are useless ! below is a view views on raw sensors reporting back with different mounting methods of the APM.

 

First image is the control to compare everything to this was just with APM mounted to the copter with nylon nuts and bolts in the standard 3 holes provided…

Continue

Hexa copter design now available for download.

Posted on September 24, 2011 at 11:20am 2 Comments

Hi Guys

 

A while I go I started designing my very own copters on Google sketchup and found a Application to convert to DWG this made it possiable to draw complex designs the easy way and still be able to send it straight to the Lazer cutter.

Because I designed this by a freely available software I geuss the best thing todo is freely share my designs with the community and hope that someone finds it usefull.…

Continue

APM Status Leds extended through expansion port

Posted on September 23, 2011 at 11:30am 0 Comments

Hi Guys

Im sure many of you can remember this from previous Blog post but just thought I might post it again and let you know that the code ready to go now APM2.24+Remzibi+Status_Leds code can be found Here !…

Continue

Comment Wall (18 comments)

At 2:07pm on October 31, 2010,
T3
Rory Paul
said…
Johann

Drop me an email and I will put you in contact with a guy in SA who has a fully functioning UAS which you could do a proof of concept with without having to get everything up an running yourself. Also have some leads on low cost thermal imaging equipment that will not be a pain to get into SA
At 4:19pm on October 31, 2010,
T3
Rory Paul
said…
No do not go the route of a Predator. You are going to need something that can lug the visual and thermal imaging cameras and all the associated gear so it will have to be bigger.

I suggest that you plan this project in two phases. One with a cheap foam airframe (Cularis, Maja or similar) or maybe to learn all the problems associated with autopilot flying then a composite airframe with better capacity etc.

You are going to need to determine if this is going to be a gas or electric system. You can get better duration out of gas but it comes with vibration problems and integration issues. You also need to determine if you want the cameras to be mechanized or fixed.

Regards

R.
At 5:45pm on October 31, 2010,
T3
Rory Paul
said…
I am not sure how effective a low light camera system would be at night. There was some talk a while back about using a ir illumination on the UAV (banks of ir LEDs) to try and improve the image quality.

Think less about the wing span size and more about the internals cargo bay and how easy it is to change configuration and how rugged the thing is. Landing a UAV during the day is hard enough but landing at night on a dirt road in the bush is going to be very very difficult. So you are going to need an airframe that can take plenty of punishment, can be fixed in the field and spare parts do not cost and arm and a leg. The Maja may be a good bet or something based on a Raven like airframe with a longer wingspan (improved duration) and ailerons (better handling). Look for something that can be hand launched (bungee) or catapult launched and can take a belly landing.

Regards

R.
At 5:55pm on January 19, 2011, Andre Henrico said…
Hi Johan, Fine thx. In Pretoria, as a Gis consultant, and you? How is your project going?
At 3:34am on February 13, 2011, optional said…

Hi Johan,

 

I'm researching the almost same setup, but for neighboorhood watch. Thinking of a autopilot  quadcopter with thermal video and day video. In Pretoria. The aim would be to identify criminals within a 20 minute flight window.

 

Thanks in advance for any assistance. Most appriciated.

At 11:50pm on February 24, 2011, Marius Liebenberg said…
Thanx Johan, Ek is bly om te sien dat daar nog slim ouens oor is in SA. Ek sal sekerlik met jou kontak hou. Ek is besig met n projek wat n quad plaform gebruik om video en enkel skoot werk te doen in die veiligheids arena. Seker maar een van die areas wat ons almal raak ne.
At 12:53pm on February 27, 2011, John said…
Hi Johann. I have a question about Magnetometers. Can I use the Sparkfun Triple Axis Magnetometer Breakout - HMC5843
sku: SEN-09371 on the ArduPilot Mega IMU Shield if I solder the 3.3 volt jumper next to the dip switches and use the 3.3v supply from there to power the Sparkfum Magnetometer, or must I use the DIY Drones Store
HMC5843 - Triple Axis Magnetometer Rev 1.2 only. I can get the Sparkfun Magnetometer locally in South Africa, so if it will work then it will be easier to get it here.

best regards
John
At 2:16am on April 4, 2011, Bryce Fraser said…
hi johann

help please
i have a the same problem with no lock on ublox 5
can you send me your config and firmware version
At 2:22am on April 4, 2011, Johann Van Niekerk said…

Hi Bryce

 

Ill try help you first few questions.

1)  has the Ublox worked before?

2) have you formatted Epromp before installing the latest version of APM code?

3) is the Ublox bought from DIYdrones or other source?

 

KInd regards PM me and we can see if we can get it working I use Ublox myself so should be able to help.

At 2:36am on April 4, 2011, Bryce Fraser said…
yes, unit was puchased from diy drone ,

i have the 5v jumper set on adapter board
I get fake get long and lats and no satellites, when viewing in cli mode on AMP
Raw gps data is coming through in cli mode

When using U center 6.10 I can flash firmware to V5.00 for Jordi's tutorial and load his config file and the Satellite bars pop up full, No Lock.
If i use Chris's tutorial on version 6.00 with his config file, I don't get any satellites popping up in u center.

Binary data is streaming in u center. I have seen the satellite bars turn blue and some of the and some going's on on the other screens briefly and then it goes away.

Thats about it.....

Thanks
Bryce / John

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