If you enjoy our forum, why not join us? :) Login removes all the ads too! Click here to register in a few simple steps

Login to remove this ad | Register Here
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Making a remote detonated firework ignition on an Alien5"
#1
Hello!

I hope somebody can help me out with this one!

I have build a race quad with a Kiss FC and an FRsky X4R . I'm not sure if you guys are familiar with this equipment.
I want to make a hot burning (steel or something) wire, to make fireworks go off on command.

The problem that I ran in to is that I run Sbus, so i cannot control different channels just by plugging in some cables to the receiver. (unless there is a way to connect Sbus and cppm at the same time, there are 3 channels left on my X4R receiver).
I tried many things, such as the buzzer connection, to make a short circuit by switching an aux switch, but it's uncontrollable. I also bought the polulu rc switch (link below), because i first thought that the aux on the flight controller was the same aux that i would use in the software. unfortunately this seemed to be an aux input in the flight controller. my guess was that all the aux functions in the software was already build in in the fc.

These are the links to my equipment:
http://kiss.flyduino.net/kiss-fc-flightcontroller/
http://www.frsky-rc.com/download/view.ph...=X4R-X4RSB
https://www.pololu.com/product/2803

I really hope somebody can help me out! Maybe you can come up with different options.

Thanks in advance!
#2
I dunno.  I have a hard enough time preventing my quads from exploding... Cry
[-] The following 1 user Likes sloscotty's post:
  • Tom BD Bad
Reply
#3
You could probably connect a relay to the buzzer pad. The buzzer is triggered by the ground pad
Reply
Login to remove this ad | Register Here
#4
By flashing the X4R-X4RSB-CPPM firmware, you can get X4R to output PWM on output 1, 2, 3 and SBUS on output 4.

Essentially this firmware turns the X4R-SB into a 8+2 or 16+3 channel RX.

firmware download: http://www.frsky-rc.com/download/index.p...pro_id=135

Quote:Binding without the jumper retains the original behaviour, i.e. PWM channels 1-3 and SBUS on output 4.

Binding with jumper turns output 1 into CPPM channels 1-8, outputs 2 & 3 become PWM channels 9 & 10, and output 4 is still SBUS.
source:
http://www.multi-rotor.co.uk/index.php?topic=14749.0
Don't be a LOS'er, be an FPV'er :) -- Blog - Facebook - Instagram - Twitter - Google Plus
Reply
#5
(10-Mar-2017, 12:09 PM)Oscar Wrote: By flashing the X4R-X4RSB-CPPM firmware, you can get X4R to output PWM on output 1, 2, 3 and SBUS on output 4.

Essentially this firmware turns the X4R-SB into a 8+2 or 16+3 channel RX.

firmware download: http://www.frsky-rc.com/download/index.p...pro_id=135

source:
http://www.multi-rotor.co.uk/index.php?topic=14749.0

Wow, Thanks! This seems legit, i'm definitely going to try this!


I'll let you know if it worked!
Reply
#6
my inexperienced contribution concerns rather the lighting procedure than the electronics: I agree with impressive-knowledge Oyvinia, if I may so, that the lighting circuit absolutely has to be uncoupled. Good old electromechanics. Side-thought is about the magnetic field of the relay, to watch out that it doesn't interfere with the rest of the electronics..
Coming up with sufficient amperage to light the fuze will be a task, though. I fear that it will have to be sustained for a while in order to function reliably, this could make the extra batt quite heavy. My spontaneous thought was a chemical approach: How about using electrical lighting of an initial charge, which again lights up the fuze? You could make small capsules containing potassium perchlorate (..watch out when handling that stuff, keep it cool, and don't compress too violently..) and light them up inside a little brass tube or similar containing the fuze as well. More available lighters like nitrocellulose have a too high brisance, will create great amounts of vapor and may blow the whole construction (including quad) to bits. Take a look at low-velocity explosives for that.. ;-)
Reply
Login to remove this ad | Register Here
#7
This is the cheapest way



Attach these wires to your LiPo voltage but put a small Relay that can be switched on by 5V.

EDIT: These Relays should be enough https://www.sparkfun.com/products/100 if 5 Amps is not enough go for a bigger rated Relay
I like turtles
Reply
#8
Don't know about elsewhere, but in Canada, TC regulations prohibit the ignition/carrying of any explosive or combustible device on a UAV. Just sayin..........
Reply
#9
(12-Apr-2017, 08:00 PM)RENOV8R Wrote: Don't know about elsewhere, but in Canada, TC regulations prohibit the ignition/carrying of any explosive or combustible device on a UAV.  Just sayin..........

There are so many laws now that I'm sure breathing the free air is probably criminal if the powers that be decide that they want to make life difficult for you.

The trick is keeping a low enough profile that they have no reason to want to. Smile


For the remote firework igniter, you definitely do need a relay as none of the outputs on a flight controller will handle the current. In fact, none of them other than the buzzer output will be able to drive a relay either.

The buzzer output, while capable of driving a small relay, will have a nasty habit of wanting to beep when you plug in the battery or arm the craft, so it's probably better to use a PWM activated relay that you can run off an aux channel or unused receiver PWM output. Something like this: https://www.servocity.com/electronic-pwm...elay-24amp

For actually making the igniter, the best thing to use would be a coil of resistance wire that you can get at any respectable electronic cigarette shop. If you make a little coil that you wrap around the firework's fuse and then connect to the relay with normal wire, you'll have something that can be easily routed from the relay to the firework and which will glow yellow hot without breaking within 1/5 second of applying power via the relay. The length of resistance wire you use determines the resistance of the igniter and therefore, the current, so you don't risk exceeding what the relay can stand.

The resistance wire is specifically designed to get hot when you apply power to it and will give you a much more reliable igniter than the method on the video that Apicalis linked. It will probably work fine without having to use a match head as well.
[-] The following 1 user Likes unseen's post:
  • Drone0fPrey
Reply
Login to remove this ad | Register Here
#10
Just put in some 12A EMAX Escs - that should set it off... Tongue
[-] The following 2 users Like sloscotty's post:
  • Drone0fPrey, unseen
Reply
#11
some fine steel wool with two wires in it might be a good ignitor
[-] The following 1 user Likes EJvdB_fpv's post:
  • Drone0fPrey
Reply
#12
Why dont you try a rc engine glow plug? It will burn with more than 3v but it will ignite. ..
Reply
Login to remove this ad | Register Here