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Electronic Detonator

Step 5Setting up the detonator

Setting up the detonator
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Warning: Make sure the battery pack isnt plugged into the detonator until the end of the setup.

Take an inch long piece of nichrome wire and tape it to whatever needs to be ignited. Connecting it to something to be ignited is a lot easier with a piece of my fuse, which can be made here http://www.instructables.com/id/E9ZBOE35P9EPA8KZXX/. If you use the fuse all you need to do is split a short section of the end of it and put the nichrome between the split strings, and tape it on, making sure that there is enough nichrome left to put the alligator clips on. If you do not use the fuse you need to make sure that the nichrome is touching what needs to be ignited.
Unravel the wire until you feel you are a safe distance from what your igniting, plug the 1/4" plug in, make sure its unarmed (Toggle set to off), plug in the battery, arm it, countdown and push the red button.
It should work, if not make sure all your connections are ok, clean the alligator clips and try again. If it still dosent work make sure you have a high enough gague of nichrome wire.

It works because the detonator is basically an elaborate on/off switch keeping the 12v from the batteries from going over the nichrome until the right moment. Nichrome is a special type of wire that increases its resistance when electricity is passed through it, and because of this it is used mostly as a heating element in hairdryers and toasters. However, the heat it produces can also be used to ignite fireworks and other things as demonstrated in this project.

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17 comments
May 24, 2012. 1:46 PMzelback1 says:
Is there any way to rig this so that you do not need the wires leading to the explosive or whatever you are lighting/launching? see, I made several dozen of the flash-bang grenades that were discussed in another forum, and they use blast caps and 400 mesh aluminum, magnesium and thermite... I am worried that I will have to keep replacing the alligator clips because of the heat and power of the explosion. Since the blast caps I use are are electronically wired, I had this idea to fit them with a radio transmission reciever, and have the capability to detonate them from far off, like maybe in the next room over so I am not blinded while my opponents -in air soft or paint ball- ARE -sorry, no italics- blinded and deafened. Another issue is that the wires would need to be extremely long. A radio transmitter would do away with both problems. Could you help me with this?
Jun 20, 2009. 8:40 AMJbs165 says:
I really need help here~! I have 4 big fireworks that I want to set off simultanusly. What should I do to create something like this that i can set off each firework alone or like 2 seconds between each one. **NOTE|** These are big fireworks and if I'm near one when it goes off, well I'm not gonna do that, but my point is I can't just try and light all 4 with a BBQ lighter.
Apr 24, 2012. 6:06 PMCheswick32 says:
I would suggest you look up how to make quick match fuses and just have a wicked long fuse funning off of that.
Oct 28, 2011. 9:54 PMmadison78 says:
I really had been on the lookout as to how I could build an electronic detonator which is reasonably safe, simple and reliable and I must say that this article really have given what I was in search of. The features that include for our own safety which are namely the arm switch, the detachable power supply and the indicator light will surely act as an aid for the inexperienced. All this under just $25 makes it an alluring spot to try out. I am planning to get a San Jose electrician to try it for me, so if it works I will do on my own.
Jul 24, 2006. 8:38 PMdtydc says:
Actually, nichrome is used in heating elements because of its resistence to oxidation, high resistivity, and high melting temperature, not because its resistivity increases. The resistivity of most (I hesitate to say 'all' because I don't know things) metals increases with temerature. This is because at higher temperatures there are more vacancies, and lattice vibrations (Wikipedia tells me lattice vibrations are also known as phonons) which decreases electron mobility.

http://en.wikipedia.org/wiki/Nichrome
http://en.wikipedia.org/wiki/Vacancy
http://en.wikipedia.org/wiki/Lattice_vibration
http://en.wikipedia.org/wiki/Electron_mobility
Nov 22, 2009. 10:36 AMMig Welder says:
hehe its called resistance not resistivity
Apr 29, 2007. 9:28 AMadamz says:
Im 13 and i built 3 a mote controled detinator the best goes for 300 yards away.
May 9, 2007. 10:44 AMTh3Ob3rst says:
Nice! why don't you post an instructable on it?
Jan 11, 2009. 4:38 PMSagar Gondaliya says:
it would be more energy efficient and faster if you hooked up a 12v dc adapter to the mono plug. You wouldn't have to keep spending money on batteries if you're like me and would use it a lot. Thnx, I modified mine to be wireless.
Feb 1, 2009. 10:09 AMrazorfighter says:
how did you make it wireless?? could you send me the plans on how to do that please?
Feb 4, 2009. 10:32 AMSagar Gondaliya says:
you have to hack a wireless mouse nd the usb hookup to the detonater to make it work. when you click.......BOOM!!!
Apr 28, 2009. 10:06 AMwibrle says:
That would be awesome. Do you have the link or website for that build?
Aug 29, 2007. 10:17 PMfeigned-echo says:
can a spark arc between the two aligator clips, i want to use this as a potato cannon lighter.
Jan 31, 2009. 11:03 AMpyro man says:
whats funny is that while there are a lot of replys to your comment,none of them actually answer your question,including this one
Dec 1, 2007. 8:39 PMthat one guy says:
Wouldn't it be better to use a BBQ lighter? that way you wouldn't need batteries.
Feb 23, 2008. 9:19 AMpyr0 says:
It is indeed better to just use a BBQ lighter.
Jan 20, 2008. 12:10 PMHAL 9000 says:
Or just one of the pezio electric strikers from the BBQ lighters. My friend did that and now his cannon fires every time. Its great.
Feb 21, 2008. 9:23 PMfollystar says:
If you really wanted to use a BBQ lighter or the pezio electric strikers you would be missing the whole point of a detonator. This like this are meant to be used with explosives and materials which it is not desirable to be around. The great thing about this is that you have the ability to stand back behind a wall or at a safe distance while still being able to deliver an efficient spark or flame to what ever you are planning on detonating.
Jan 20, 2009. 7:39 PMRadioactive_-Chemist101- says:
Better yet if u want a really fool proof ignition system for a potato cannon use a tazer like me!! Works great and never fails :D
Jul 25, 2008. 8:24 AMfunkymunky says:
im new to electronics so how do u attach the monopulgs to the wire and also the mono plug to the aligator clamps?
Jan 5, 2008. 11:43 PMAceFace says:
Is there any way I might be able to purchase one of these. I can't right now but if I were to try and contact you in the future.
Jul 15, 2007. 8:40 PMthe gizmoman says:
wouldn't a rocket initer work?
Jul 12, 2007. 6:38 PMReeper says:
i built a detonation system a bit more complex then this. i might post it later on. it has a switch to trigger two seperate circuits so 2 pyrotechnics can be ignited from a distance without having to reset as often. How much distance can you get from your target you want to detonate? running off of 6 volts i cant light up the nicrome from 12 feet away. does anyone know what kind of transformer would work for this?

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