Hello !
I want to ignit firecracker from distance with arduino, so I need a ignit module.
I plan to use 2 arduino mini and 2 nrf24l01 for communication.
It will be powered by a 9v battery ( I want to atttach it to my little quadcopter 
)
do you have an idea where I can fin a igniter module ? it need to be really lightweight
Fine steel wool
There's glow plugs for remote controlled fuel engines.
Google for that.
This is a picture i found after googling:
They shouldn't be too hard to find.
They will take quite a lot of current, so check to see your battery can handle that kind of current without overheating.
A typical drone battery will have an even more spectacular effect than those firecrackers of yours, when overheated.
If you let these plugs glow for too long, they will burn out and i'm not sure how well these will like it when you abuse them to ignite such ignition wick on fireworks.
A bare Arduino isn't capable of controlling the glow plug directly, so you do need some external controlling electronics.
MAS3:
There's glow plugs for remote controlled fuel engines.
That can be an expensive route - it is very easy to "burn out" a glow plug - and while they aren't that expensive, they are very expensive compared to other solutions.
AWOL's suggestion of steel wool is likely the cheapest solution. A cheap hiking/backpacking "firestarter" is to carry some steel wool and a 9-volt battery (separate, of course!). If you can extract a length of a single strand from the wool - then wrap it around a matchhead - that works extremely well. Indeed, any fairly fine wire should work ok.
Another solution - though more expensive - is to use standard hobby-grade rocket igniters, such as those by Estes and other model rocket suppliers.
If you need re-usability - then using a length of nichrome wire would be best. This is the same wire as is found in a toaster or a hair dryer. In fact, those are ready sources - so if you find one in the trash, scavenge it for the wire. Alternatively, you can purchase the wire new from various online suppliers and other places.
An incandescent torch bulb with the glass bulb broken off can make a small low power igniter for one off use.
Russell.
As AWOL said, use a single strand of fine steel wool. It will glow red hot and burn out.
Glow plugs (from my long ago memory) use low voltage and high current. This will be a problem with a 9v battery.
Weedpharma
weedpharma:
Glow plugs (from my long ago memory) use low voltage and high current. This will be a problem with a 9v battery.
Yeah - I think you had to use this particular 1.5 volt dry cell (it was about the size of a beer can, with screw terminals on top) that could put out a lot of current.
Ah - here it is - a #6 "igniter" dry cell:
http://www.prc68.com/I/No6.shtml
...no, I'm not old enough to have used one, but I read way too much as a kid and as an adult...
A very small LiPo battery would be awesome. You could use a relay to short it out. It could do the fireworks by itself!
