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What are you currently MAKE'ing? Answered

Thought I would break the ice with an obvious. I just thought of this an hour ago, and haven't had a chance to work on it. I want to take out the huge antenna on my cell phone and just wind a coil around in my phone's case. Shouldn't be hard. (The "MAKE" is MAKE an antenna that fits inside your phone.)

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trialex
trialex

14 years ago

Hey guys. I'm working on an automatic flamethrower. I'm having trouble with the ignition stage, and if anyone has any ideas that would be great. I starting off trying to use a servo to push down on a peizo electric BBQ lighter - but the force required is too much for a standard servo. I can't find any cheap and safe coils to create a spark across a spark plug. My solution, which works but is non-permanent and a bit fiddly, uses a disposable camera flash to create a high voltage, then two wires soldered to the flash tube are touched together. The wires are brought together automatically by a servo. I'd really like to take the servo out of the equation - the arms holding the wire tend to shift over time. if anyone has any ideas on how to make a spark at a timed interval that would be awesome.

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Zaphod Beeblebrox
Zaphod Beeblebrox

Reply 11 years ago

what about insteadof a servo you could use a hose clamp and moter witch would squeeze the button down

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tumadre776
tumadre776

Reply 12 years ago

what if you but the grill ignitor behind the trigger and just had a bigger trigger to push both at once.

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jeff-o
jeff-o

Reply 12 years ago

Try a rotary igniter. My barbeque uses one - just turn the knob for ignition. It should be easy enough to gear it down for use with a servo.

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pbekic001s
pbekic001s

Reply 12 years ago

dude just take a deodorant spray and a lighter. Then spray it and light it. theres ur simple flamethrower

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trialex
trialex

Reply 12 years ago

I think you missed the "automatic" bit. I don't want to have to be there when it goes off. Think about it like a burglar alarm that instead of triggering a siren triggers a flamethrower. Now how are you going to get the lighter to light automatically? That's my question!

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stuffman366
stuffman366

Reply 12 years ago

a 12 volt battery and a spark plug should dothe trick

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psymansays
psymansays

Reply 12 years ago

One ignition method that works is to run 120VAC through a DC Capacitor in your combustion chamber. Use a relay to switch it the volts on/off; that's what your current servo situation is emulating, is a relay.

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larsjet
larsjet

Reply 13 years ago

Hi trialex I read your comment. Why dont you use something called a jacobs ladder. Or by a small stun gun which you can remotely fire or even attach a long cord with a switch to. These both make a spark which lasts so why dont you try it... stun guns are really cheap!

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trialex
trialex

Reply 13 years ago

Thanks, but in Australia, stun guns are neither cheap nor legal.

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psymansays
psymansays

Reply 12 years ago

You could try using a DC-DC converter from an automotive neon tube thingy like they sell at auto parts stores, for your high voltage. You could probably get enough volts to jump across a car spark plug, for example.

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Firebert010
Firebert010

Reply 13 years ago

A Jacob's ladder requires extremely high voltage, it would be far too dangerous to walk around with one of these on the end of something. Not to mention a device that produces the voltage that is required to make it is by no means portable.

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_soapy_
_soapy_

Reply 13 years ago

Use a cheap tazer and run some wires from the end, or remote the switch and put the tazer at the muzzle. I'd go with a gas torch to light, though, as it will be fairly windproof, and is sure to light the liquid. You could tap the fumes off the tank and light that out a nozzle, rather than carry extra. I'd make it so the ignition was split from the spray, so each can be toggled separately. Remember you want to be able to spray a fairly thick liquid, remember that the tank is a bomb if you get it wrong, and remember that this isn't going to be a toy.

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rocker9455
rocker9455

Reply 13 years ago

hes in Australia stun guns legal ...

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_soapy_
_soapy_

Reply 13 years ago

So using a stungun is probably a good idea then. Big fat hot sparks, and a reliable trigger and circuit.

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rocker9455
rocker9455

Reply 13 years ago

sorry i meant illegal typo..

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silentromance
silentromance

Reply 13 years ago

I'm in the process of boosting the bass and sound on My cd player, and doing an intructable on the process of jumping them

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Dr. No
Dr. No

Reply 14 years ago

Take the guts out of one of those elctrified misquito rackets and just press the button when you want it to spark. And don't touch the wires, they hurt a lot.

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w00ty32
w00ty32

Reply 13 years ago

LOL, those things are awsome

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w00ty32
w00ty32

Reply 13 years ago

Create a wire that will have a contained short... i saw it om mythbusters, not sure quite how to do it...

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Kiteman
Kiteman

Reply 13 years ago

Leverage! You have a (long-ish) arm, pivoted at one end. Position the BBQ sparker under the arm near the pivot end, use the server to lower the far end.

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spinach_dip
spinach_dip

Reply 14 years ago

what's your budget here? can you affford a $5 junkyardHHH auto recycling center ignition coil?

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spinach_dip
spinach_dip

Reply 14 years ago

Is there a tutorial on the markup language used?

I've just discovered that a caret makes text following it superscript. An additional caret (that thing above the "6") makes it drop down to normal level.

H2O

So is there a help page? Why is there no "comment help" on the comment submission form? How would we escape this feature/EASTER EEG?

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intoon
intoon

Reply 14 years ago

Does an escape character work?

H2\O\

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intoon
intoon

Reply 14 years ago

I guess not...

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Goodhart
Goodhart

Reply 13 years ago

Do you meansubScript ? ;-)

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zachninme
zachninme

Reply 13 years ago

Haha -- exactly 1 year, 1 day :P (We've had forums for a year!?)

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Goodhart
Goodhart

Reply 13 years ago

Oh my, I need new glasses.....I didn't see the year LOL *blush*

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zachninme
zachninme

Reply 14 years ago

I wonder if there is a thing for subscript?

SuperScript
Sub\/Script

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zachninme
zachninme

Reply 14 years ago

\/ isn't it...
Subscript

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Goodhart
Goodhart

Reply 13 years ago

You are right v is not subscript LOL

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WVSAL311
WVSAL311

Reply 13 years ago

you can use a coil and from a fuel oil furnace 110 vac to 100000 vdc

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John Smith
John Smith

Reply 13 years ago

You could use a flyback transformer. That should be enough to get it going.

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mark101
mark101

Reply 14 years ago

An allways lit pilot light is what the pros use no? say a lighter like a zippo, how long would the feul last? I think this is safest , as you don't want an accident spill of a large amount of fuel to all of a sudden be ignited.

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trialex
trialex

Reply 14 years ago

Yeah that's not a bad idea. I guess when I started the project I was looking for something that I could leave for days on end, and I thought a zippo would be too prone to going out over that time period. Now I'm thinking of a more short term use (like 30 mins) so a permanent pilot may be the way to go. It's been fun playing around with electric sparks though!

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jtobako
jtobako

Reply 14 years ago

why stuck on electric? attach a flint sparkwheel (like any cheap lighter or, better, one of these old sparky guns) to a regular motor and spark away...

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mark101
mark101

Reply 14 years ago

they use a spark generator(like that?)under the NASA spacecraft for 10 second before takeoff, too make sure the flame doesn't accidentaly go out.

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mark101
mark101

Reply 14 years ago

thats cool idea! I like it, only factor there is that the spark temperate has to be able to ignite the fuel. Some fuels need a big kick to get going.

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sandpaper600
sandpaper600

Reply 14 years ago

I don't know if you've overcome your igniter problem, but RV furnaces have a multispark igniter that runs off 12VDC.

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dijme
dijme

Reply 14 years ago

depending on what you are making the hull of the gun out of you could drill holes and attach small bolts (as small as you can find), align them where the ends will be close enough together to create the spark.You said you already were using an igniter from a BBQ right? just hook the wires to each of the bolts.

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trialex
trialex

Reply 14 years ago

yeah but howe do you push the button that makes the spark? a regular servo doesn't have enough torque

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mdivinc
mdivinc

Reply 14 years ago

fine steel wool,2 wires, 9 volt battery. Ignites anything. Mike D NJ

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trialex
trialex

Reply 14 years ago

I actually don't think it would... I tried heating up nitrile wire (i.e. my foam hot wire cutter) and it wouldn't ignite the spray

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westfw
westfw

Reply 14 years ago

A stun gun will create nice (and somewhat continuous) sparks. The circuit is simple enough that you can probably duplicate it on a slightly smaller scale.

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mdivinc
mdivinc

Reply 14 years ago

you can use a small piece of steel wool (fine) insert 2 wires of 24ga. or thicker and a small 9 volt battery. The steel wool burns up igniting what ever you want. Mike D NJ

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seudo411
seudo411

Reply 14 years ago

U can use a ignition coil / relay setup... That creates contious spark, using a car spark plug....

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protolabs
protolabs

9 years ago

i am making sprockets!!! https://www.instructables.com/id/simple-wooden-sprocket-without-cnc-machines/