I'm trying to make a timed smokebomb that will go off when it reaches the countdown time I've set. It is to use with Airsoft games.
I'm going to use a visco detonator(e-match) and a transistor to make the fuse off the smokebomb go off.
This is the visco detonator:
The smokebomb is like this:
Now my question is: which transistor do I need to use? Do the fuse will go off with the setup?
I've heard to use N2 transistors, but I don't know which one.
Maybe someone knows a better way to blow the fuse?
The way to set it up is to have a resistor on the arduino pin going to the base of the transistor. Hve the emitter go to ground with the detonator in series with the collector(ground wire of the detonator to the collector pin).
thegeekway:
What voltage/current does the detonator require?
The way to set it up is to have a resistor on the arduino pin going to the base of the transistor. Hve the emitter go to ground with the detonator in series with the collector(ground wire of the detonator to the collector pin).
Well, I was searching for it, but it's not mentioned on the website of it.
I will search for it on other websites now.
Techone:
Any TO-220 type - MOSFET or NPN use 4 A or more.
This.
I've made stuff like this before and have several projects in the pipeline for this purpose! (Although I use Mk5 maroons typically, rather than smokes).
My personal choice is an IRF540N N-channel MOSFET, but I have also used a TIC106 SCR to accomplish the same ends. The igniters I use obliterate themselves open-circuit after firing, so the SCR will turn off when the job is done
Post pics of yours when it's done Would be interesting to compare notes. I'm in the process of miniaturising mine now, so it can be used in a hand-held "stick it to the wall, set it and run" sort of fashion.
Wondering if I should use the external interrupt features to devise some sort of anti-handling feature.... mmm naughty. ]
Just checked my datasheets and the TIC106 I mentioned can handle 30A surge, 5A continuous. Might be worth considering for future projects as you'll find it pretty difficult to kill one in your chosen application!
A SCR rated of more than 4 A, is better for your application. I agree with BulletMagnet83 on this one.
The TIP122 is OK too.
Ok Do you mean TIP121?
BulletMagnet83:
Post pics of yours when it's done Would be interesting to compare notes. I'm in the process of miniaturising mine now, so it can be used in a hand-held "stick it to the wall, set it and run" sort of fashion.
Wondering if I should use the external interrupt features to devise some sort of anti-handling feature.... mmm naughty. ]
Just checked my datasheets and the TIC106 I mentioned can handle 30A surge, 5A continuous. Might be worth considering for future projects as you'll find it pretty difficult to kill one in your chosen application!
Sure! I will post a video of mine when it is finished.
Nice idea for the 'stick to wall', it would be nice for Airsoft 'plant the bomb' games. XD
You can always show some vids or pics of yours if you want
A very early and ugly breadboard prototype I've refined the code a fair bit, and using a Pro Mini and a small serial-enabled LED module my final build should be quite small. I'm looking forward to having some production models done to take to games!
Would be interesting to compare notes. I'm in the process of miniaturising mine now, so it can be used in a hand-held "stick it to the wall, set it and run" sort of fashion.