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Post by ghippleh on Jul 23, 2005 19:22:36 GMT -5
I know exactly what you are talking about blowmeupspudgun. I learned the answer in one of my physics classes. The ability of the spark to travel distance has a linear relationship with its strength. What does this mean? You have a small spark which means it is weak. How do you make it larger? You wont find a large enough capacitor (thats under a couple grand) so you must use an inductor. Stun guns are able to implement this but I would advise not trying it because you have to devlop a potential in the 1000's of volts. If you want to build a unique electric ignition system you might want to try using electrically ignited gunpowder caps. you will have to change them out each time but I would imagine the burn much quicker.
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Post by sgort87 on Jul 24, 2005 9:09:15 GMT -5
You don't need something unique. You need something efficient. This is why people don't use capacitors much. Stun guns create a large spark by using coils to change the voltage. The larger the voltage, the longer distance the spark can travel. The thing about maximum spark length is that it's not only voltage that affects it, it's also the atmosphere. The more conductive the atmosphere is, the more the spark can travel. So with different gasses in the chamber, the spark can have different maximum distances. Don't worry about it though. A small spark is generally just as good as a big one.
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Post by blowemupspudguy on Jul 24, 2005 19:59:32 GMT -5
i use electrically ignited blasting caps for lighting my rockets. i take a christmas tree bulb and break the tip off, i then fill the insides with black powder and magneseium. this will light anything when fired with a camera capicator, but i was looking for somthing that i didn't have to change out every time
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Post by darthtator on Jul 25, 2005 11:36:10 GMT -5
sgort87, I know your looking for the simplest, and most efficient way to ingnite your fuel mixture but you should notice the topic name "a new ignition idea". Some of us enjoy finding new ways to do old things, like in this situation. you have useful information no doubt, but your kinda countering what were trying to talk about here ya know? No hard feelings I'm just saying.....
Nick
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Post by sgort87 on Jul 28, 2005 22:43:32 GMT -5
Yeah, I know, sorry. Much like my posts on the spring powered gun, I don't mean to discourage you. I just mean to warn you about how annoying bulky things are. Capacitors tend to be bulky. I'm just sayin usually it's best to go with the stun gun thing. Remember that you are lighting a highly flammable gas, not a Class A Explosive (They have an extremely high flashpoint).
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Post by blowemupspudguy on Jul 28, 2005 23:12:33 GMT -5
true, just thinkin about it. somthing that uses blasting caps would be usefull for a solid fuel cannon(solid brass cannon!!!...i wish...) i still want to find a way to use capicators though...
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Post by sgort87 on Jul 30, 2005 11:04:05 GMT -5
A stun gun circuit DOES use a very large capacitor. It just needs those other components to work with it. Using a stun gun IS using a capacitor. If you work with trying to use a capacitor to make a spark, you will need other components to do so. Those other components are the ones found in stun guns. Basically you are trying to reinvent the stun gun and you don't even realize it. And as for solid fuel... lets not go there please. The cops dislike normal spud guns, but huge pipe bombs... no way dude, you get locked right up. And with solid fuel the expansion is SO big that I GARANTEE it will blow up your chamber if you don't know what you are doing, killing you and everyone in sight distance of it.
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Post by blowemupspudguy on Jul 30, 2005 11:20:54 GMT -5
im not going to build one(hence the i wish)
and the reason im still wanting to use camera capicators is because i can get so many of them for free
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Post by sgort87 on Jul 31, 2005 1:06:15 GMT -5
Capacitors are so cheap it's almost free anyway. Tell me the common capacitance on the capacitors you can swipe. It should say something like 1F or 1000uF or something. The "F" stands for Farads, named after Micheal Faraday, the man who invented capacitors. I won't go any farther than that... The "u" before the "F" is the Greek symbol "mu" It looks like a letter "u" but with a small tail on the left side also. The mu stands for "micro" meaning x10^-3 which is a thousandth of a Farad. Find out what that number and label is and Ill let you know if it is useful.
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Post by blowemupspudguy on Aug 1, 2005 8:24:17 GMT -5
most of the larger ones arn't labled but the ones iv found that are, are 330 volt 80 uf. like i said they are only small ones out of disposible cameras, iv recently come across a large capicator out of a water heater, but it's fried. im constantly getting more of the cameras because alot of the parts are usefull, and you get free batterys with them.
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Post by ghippleh on Aug 2, 2005 10:56:03 GMT -5
a stun gun does use capacitors but only to set up the proper current for the magnetic field needed by the inductor. If you wan't to build a circuit that mimics a stun gun, the most prized piece of your circuit is going to be an inductor.
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Post by sgort87 on Aug 9, 2005 1:03:55 GMT -5
Seem's you know your stuff there buddy. Hehe. Well about caps, they tend to be a bit of a nuisance. How exactly do you plan to set up this circuit anyway? And remember you need to figure out how to charge the cap and figure how to fire it... If you need help I can show you a decent way, but at a voltage that high it will be difficult. To get a charge of that number listed, it needs to be connected to a voltage of that listed. It will be lower if you cannot get it that high.
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Post by blowemupspudguy on Aug 9, 2005 10:47:10 GMT -5
sevral capacitors i have just found are 330 volt 160 uf which should be eisier
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Post by sgort87 on Aug 12, 2005 10:22:08 GMT -5
Yeah 330V is kinda hard to do unless you know your electronics well.
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Post by blowemupspudguy on Aug 17, 2005 11:13:41 GMT -5
am i correct in thinking that if i wired two capacitors together the uf would increase but the voltage would remain the same?
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