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Posted by kallend | May 18, 2019 @ 01:02 PM | 28,115 Views
Make Your Own Inexpensive Centerburner

I have a dozen or so EDF models, most of which are of types that were/are equipped with afterburners. After buying several LED “centerburner” systems, I decided to see how hard it would be to make my own.

THIS IS NOT A KIT AND I'M NOT TRYING TO SELL YOU ANYTHING.

So this is what I managed to do:

aftrbrnr Su25 (0 min 22 sec)


This project requires electronic soldering and component wiring skills and is not a good first electronic project. However, anyone with some experience will have no problem.

It also requires access to a 3D printer to make the adapter to mount the lamp to the EDF motor. I have posted some adapter STL files for many popular systems on Thingiverse.com and there are services listed there that will print parts for you if you don’t have your own printer or a friend with one. Even a cheap consumer grade 3D printer will suffice as the adapters are neither large nor complex.

https://www.thingiverse.com/thing:4042564 .

If you want to design your own, there is simple design software available (such as the FREE https://www.tinkercad.com ).

This article only describes the electronic part; fabricating the adapter to mount the LED unit to the EDF motor is not covered. Anyone familiar with 3D printers should have no trouble making the mount, it takes about an hour to print on a typical consumer grade printer. While the adapter is printing you can be installing the controller and...Continue Reading
Posted by kallend | Feb 28, 2014 @ 08:08 PM | 32,787 Views
I have LED strips on my F550 with NAZA M. The attached spm file uses the DX9 sequencer to produce a strobe-like effect with the LEDs. The sequencer produces the "flash" effect and the mixer adds this to the selected output channel (AUX3 in my case). The mixer also adds in a value from one of the 3-way switches (I used switch D), so that the overall result is, depending on the switch position, that the LEDS are "off", "strobe", or "on".

The Rx AUX3 output drives the LEDs through an electronic on-off switch such as this http://hobbyking.com/hobbyking/store...ed_Switch.html

You may need to reverse the channel output depending on whether switch you use is active low or active high.

Edited to add: Whatever channel you choose to drive the lights needs to be assigned to INH in Channel Assign, so that the sequencer or switch can then be used to drive that channel using the MIXER function. I had the mixer set up to be controlled by Switch D. When Switch D is in the "2" position, it sends its own value (interpreted as "off") to the light control. In the "1" position it sends the sequencer strobe to the lights, and in the "0" position it sends its own value ("on") to the lights.
Posted by kallend | Oct 09, 2013 @ 12:00 PM | 13,646 Views
I set up my DX9 in the same way described in my blog entry for the DX8.

The .SLM file is attached.

Be aware that the flight modes are set from the pitch curves (pitch channel goes to the NAZA's "U" input), and the numbers probably need tweaking for different NAZAs. Check with Assistant that the values do indeed put the slider in the "blue" for each of the flight modes.
Posted by kallend | Jan 27, 2013 @ 05:28 PM | 13,155 Views
Those who want to have switch selectable MAN, ATTI, GPS and Failsafe from a Spektrum DX8 (or higher) have generally been advised to use ACRO mode on the transmitter, and to set the flight mode ("U" input to the NAZA) on one of the 3-position switches, and then mix in the input from a 2-way switch to get to the Failsafe value.

This is how I did it at first, and it works, but it does involve (typically) setting endpoints on the flight mode channel to achieve the MAN and GPS values, using subtrim to ensure that ATTI is in the right place, and then programming the programmable mixers to get the failsafe.

However, this struck me as an overly complicated solution to a simple problem, and one that is likely to be confusing if you come back in 4 months time and need to change something and can't recall why it's set up that way.

What I ended up doing was using HELI mode instead. This allows the TX "pitch" channel (Channel 6) to be used for the "U" input on the NAZA. So be sure to connect the Rx channel 6 output to the NAZA's "U" input.

I set up the new model in the TX memory as a "1 Servo swash type NORMAL" HELI (this is the default so you don't actually have to do anything). All this means is that one channel is dedicated to each of the "elevator", "aileron" and collective pitch functions with no weird mixing involved. Connect the Rx throttle, elevator, aileron and rudder outputs to the corresponding NAZA...Continue Reading