TABLE OF CONTENTS


Make a Do-it-Yourself EDF Afterburner

3D printer parts files for many RC aircraft (mostly EDFs).

AS3X and SAFE on a canard delta with iX20

Channel expander for SRXL2 (SMART) Spektrum receivers

Fast Arduino door sequencer for Freewing Eurofighter V3

Morse code signaling lamp for WW2 aircraft or ships

Creating a cyclic sequencer for a Spektrum iX transmitter

Using a Spektrum radio in a delta with elevons

Fast Arduino Sequencer for Freewing Eurofighter V3

VERY abbreviated construction details follow:

Arduino gear/door sequencer on Freewing Eurofighter V3 (0 min 28 sec)

This replaces the s-l-o-w gear/door sequencing the in stock control box.

This sequencer optionally ignores gear channel inputs until it receives the first "gear down" switch change. You may need to cycle your gear switch when first powered up if this option is enabled. Instructions on how to enable this are in the comments at the head of the sketch.

Make sure the gear and doors are not obstructed when moving the landing gear.

1. The input and output pins are described in the Arduino sketch (attached) and are:

Pin 3 - signal input from receiver gear channel

Pin 6 - signal output to main gear doors

Pin 8 - signal output to nose gear door

Pin 10 - signal output to retracts

Pin 7 - mode select switch, see item 7 below.


2. The signal input to the Arduino is pin 3. A servo lead needs to connect this to the receiver's gear output port. At this time the Arduino is not controlling the landing lights, so you will need to use a Y connector to connect the RX gear channel both this Arduino input, and also to the original controller board's gear input which is still controlling the lights. The + and - leads from this channel will be used as a COMMON CONNECTION to power the Arduino and also be used for the common power to the servo and retract outputs except as described in step 3.

3....Continue Reading

EDIT: as of the March 2024 iX series firmware update a cyclic sequencer has been added as the third pre-programmed sequencer. I am leaving this post up here in case anyone wishes to create an additional one.

All the recent Spektrum transmitters except the very lowest level now contain a feature called the Sequencer. This allows you to set up a switch and/or an input to a channel that changes over time in a predetermined way once set in motion. On the DX, NX and iX series there are two pre-defined sequencers designed for sequencing the raising and lowering of retracts along with opening and closing of gear doors, without needing a dedicated controller in the aircraft. There may be, in addition one or more general purpose sequencers that have not been pre-programmed. Each sequencer can control two separate items (such as retracts and gear doors) and is set in motion by a switch. Move the switch one way and the sequence goes forward (e.g. open the doors, then lower the gear), move it the other way and the sequence reverses (raise the gear, close the doors). The timing in each direction is adjustable.

But ever want to have a channel that moves back of forth all on its own for whatever reasons. Examples: a gun turret, wipers, lights that flash without a flashing controller, maybe a pilot head moving around randomly, or even just a servo tester/exerciser that runs all by itself from the transmitter without a dedicated hardware servo tester. This is called a “...Continue Reading

just a place holder

How to make a Do-it-Yourself Afterburner

THIS IS NOT A KIT AND I'M NOT SELLING ANYTHING.

This thread contains complete instructions on how to make a simulated afterburner for an EDF jet, along with software code for a controller that will independently drive one, two, or four exhaust nozzles, complete with optional flickering effects and brightness controlled by throttle position. There is no charge for the designs or for the software.




I have twenty 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. Turns out it's not hard at all.

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.

Link to adapter files: https://www.thingiverse.com/thing:4042564 .

If you want to design your own, there is simple design software available (such as the FREE https://...Continue Reading

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.