Stefan Gofferje's Blog (48)

Neopixel LEDs as status LEDs for Ardupilot

Sometimes there's just no good place to mount the external LED to on a copter or one simply wants more light output... While developing my own little light controller, I wrote a decoder which decodes the I²C control signals for the external LED and controls arbitray amounts of Neopixels accordingly.…


Added by Stefan Gofferje on January 3, 2017 at 5:49am — 1 Comment

3D-printed holder for Taranis flight mode switch

This is the first version of my mode switch holder for the Taranis. It fits the Hobbyking / X-Rock mode switch. It mounts in place of the left slider (I pretty much never use the sliders). A hole to route the cables is included in the design. This version still is a little…


Added by Stefan Gofferje on December 17, 2016 at 4:20am — 2 Comments

DEF CON 23 - Robinson and Mitchell - Knocking my neighbors kids cruddy drone offline

Very interesting talk from the DefCon conference about attacking drones.

Added by Stefan Gofferje on September 25, 2016 at 12:19pm — 1 Comment

Solo as a character in a viral video

Just stumbled over this... Devin Graham aka. Devin Supertramp, who is one of the top successful YouTube creators, used a Solo as a character in his latest viral video.

Interesting idea...

Added by Stefan Gofferje on May 7, 2016 at 8:56am — 2 Comments

On the importance of being thorough when setting up your UAV

Yesterday, I was preparing for a rather simple auto mission. I set everything up, did a last minute change to CH7_OPT, then positioned my IRIS on a nice place for takeoff. I armed in LOITER and raised the throttle. The IRIS lifted off to about 50cm and started drifting to the right.I tried to steer against with no effect. I switched through modes…


Added by Stefan Gofferje on June 13, 2015 at 3:00am — 8 Comments

Lokkisaari - gull island

A friend asked me if I could help him and his fellow birders of Lokkisaari ry out and take some aerial images of a bird reserve they are maintaining. Of course, I was happy to help!

Those guys are doing an…


Added by Stefan Gofferje on May 27, 2015 at 7:57am — 4 Comments

Robot vs. Tiger

I ran into this on Youtube and thought, I'd share it. For once, it's no flying thing for a change and second, I think, among all this politics and regulation stuff which recently dominates this site, it would be nice to see some really cool (and cute) usage of robots again.

Added by Stefan Gofferje on July 2, 2014 at 7:44am — 2 Comments

Development of NDVI postprocessing plugin for frei0r / the MLT framework - video test footage needed!

Brian Matherly, one of the developers of the MLT video processing framework started working on an NDVI postprocessing plugin which will make it very easy to create NDVI composite videos from infrablue or other IR/VIS footage.

There already is a working proof of concept at…


Added by Stefan Gofferje on June 19, 2014 at 2:00am — 10 Comments

Video: IR video postprocessing

For a few dollars you can buy replacement lenses without IR cut filter for popular FPV cameras and also IR passthrough filters from eBay. Additionally, many digital cameras can be modified for IR recording by simply removing the IR cut filter from the sensor. As a result you get very pinkish footage.

I have written about the postprocessing of IR…


Added by Stefan Gofferje on June 14, 2014 at 6:37pm — 2 Comments

Flexible 3D-printing filament

As there's surely a relation between the maker scene and the UAV scene, I thought that might be interesting.

Fenner Drives came out with pretty tough but flexible TEP filament for 3D-printing a couple of months ago. I can imagine a ton of applications for this stuff in UAVs, like anti-vibration mounts or protective shells for autopilots, cameras,…


Added by Stefan Gofferje on May 16, 2014 at 8:36am — 4 Comments

Mythbusters, please help! (Open Letter)

(Image: Wikipedia)

Dear Jamie, Adam, Tori, Kari, Grant and production crew,

I'm a huge fan and watch your show since the first episode!

I'm sure you have by now noticed the dire situation in which not only us "drone"-hobbyists but in fact all…


Added by Stefan Gofferje on May 10, 2014 at 1:38am — 37 Comments

Flight instruments for MAVLink - status update - altimeter ready

A couple of days ago, I finished integrating the Flight Illusion altimeter into my library and the MAVLink interface. I had a few issues talking to the gauge, specifically, controlling the displays but that's solved at the moment.

I have some additional video created with playing TLOGs from but my video editor is on strike, so those videos…


Added by Stefan Gofferje on May 3, 2014 at 10:47am — No Comments

Updated: A closer look at DJI's no-fly zones

A few days ago, I already wrote an article about our "Apple of the drone manufacturers", DJI and it's new no-fly zones. Now it's time to have a little more detailed look at their idea.

What DJI did was introduce no-fly zones of 8km (5 miles) around "major airports". I already noted, that…


Added by Stefan Gofferje on April 12, 2014 at 4:30am — 28 Comments

A little progress with instruments

I haven't been posting anything in ages - and about as long have I been pretty busy with other stuff but now I finally had the time and peace to continue working on the flight instruments integration. Here's a little video of the progress.

I still have to iron out a few minor issues but basically it's working, so I hope, I can go to the next gauge soon,…


Added by Stefan Gofferje on April 6, 2014 at 8:02am — 8 Comments

"Real" instruments for MAVLink UAV groundstations


You all might remember my integrated groundstation project, which I started earlier this year. Based on this project, I started integrating flight instruments from Dutch manufacturer Flight Illusion.…


Added by Stefan Gofferje on October 16, 2013 at 4:08am — 15 Comments

"Warning of RC-Timer" or "Why you shouldn't buy from far east cloners"

As many others, I have bought some "clone products" from RC-timer in the past, simply because some stuff is pretty cheap there. Now, I got the bill for that and learned that paying less often means paying double.

Earlier this year, I bought two MinimOSD clones from RC-Timer. One went to my copter and the other for the moment into storage for another project. Several weeks later, I…


Added by Stefan Gofferje on October 13, 2013 at 2:30am — 61 Comments

The end for volunteer rescue services' use of Micro UAVs in Europe!

I have recently been quite active regarding the use of Micro UAVs in Search and Rescue here in Finland and I also have been in contact with the EU Commission on this matter.

Here in Finland - as in many European countries - Search and Rescue missions are carried out under the authority of the police but mainly by volunteer organizations, such…


Added by Stefan Gofferje on October 3, 2013 at 5:00am — 23 Comments

12kg X4 quad, 44 minutes flight time

Ferdinand aka. EndOfDays did it again!

His latest project is an X8 with 8x T-Motor U8 with 29" propellers.

To test the motors' performance and efficiency, he fixed up an X4 quad frame from aluminum. His first test was already impressive: 4kg frame, 4kg batteries (8S) and 4kg payload = 12kg TOW - overall flight time: 44 minutes.

Follow his…


Added by Stefan Gofferje on September 21, 2013 at 10:10am — 9 Comments

German chancellor likes drones...

Merkel Buzzed by Mini-Drone at Campaign Event

Original article:


09/16/2013  |…

Added by Stefan Gofferje on September 18, 2013 at 9:30am — 3 Comments

IR photos with the Boscam HD19, part 1

On my multicopter, I have a Boscam HD19 camera. This camera was explicitely developed for use on UAVs and has some interesting functions, like live video out, full HD recording and taking photos. The recording functions can also be controlled via the UAV's remote control, which makes it especially useful. The stock lens is very wide-angeled and - in my opinion - not of excessively good…


Added by Stefan Gofferje on August 11, 2013 at 6:05am — 13 Comments

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