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A flamethrowing jack-o'-lantern keeps the trick-or-treaters a safe distance from your house and is a fine addition to any anti-Halloween arsenal. At the first sign of any sugar-obsessed imp, simply press the trigger button and wirelessly shoot a one-second burst of flames out of the jack-o'-lantern's mouth. This plume of hellfire will make even the most bold of people think twice about approaching your door. Very few people are willing to risk life and limb for the chance of a tiny box of milk duds.

WARNING!: This pumpkin is extremely dangerous and you definitely should not make one of these. The instructions were posted here are for entertainment purposes only. I do not condone the manufacture or use of flamethrowing jack-o'-lanterns. Seriously, nothing good will come of making one of these. Don't do it.


Step 1: Go get stuff


For carving the jack-o'-lantern, you will need:

- A large pumpkin (mine was probably about 18" in diameter)
- An assortment of cutting knives. Serrated seemed to work the best.
- A marker
- Paper and pencil
- Scissors
- A spoon
- Other scraping implements. I found a chisel worked very well.

For the remote controlled flamethrower:

- Door lock actuator
- SquidBee transmitter and receiver. I had these lying around from a previous project. Any Arduino/Xbee combination should do.
- An extra ATMEGA168 or ATMEGA28 (only if using the Squidbee setup above as the receiver has no chip)
- Small can of WD-40
- 12" x 12" x 1/8" sheet of black acrylic
- SPST 5V relay
- Perfboard
- 5" x 2.5" x 2" project box.
- SPST momentary pushbutton switch
- 10K resistor
- (x2) 9V battery snap
- (x2) M-type plug adapters
- Misc. long zip ties
- 16" x 2" x 1/4" aluminum extrusion
- 3-1/2" x 1/4 bolts
- (x6) 1/4 nuts
- Tea light
- Matches
<p>So the Door Lock Actuator spec is to 12V. Does this work well with the 9V supply?</p>
<p>I don't know, but it likely should still work with 9V.</p>
Since no one is going to build this I don't have to tell you not to swap out a can of engine starting spray (ether) for the WD-40. That would make a flame that is much more dangerous. DON'T DO IT!
<p>Haha lol, what about carburetor cleaner? :D</p>
OMG your porch is made of wood though!
<p>Wood isn't as flammable as most people think.</p>
<p>That's probably why they make wood stoves.</p>
<p>That's not how combustion works. To catch an object on fire, it has to be brought up to its ignition temperature for a long enough period of time to get that self sustaining reaction going.<br>A momentary burst of fire, unless the object has a very low ignition temperature, usually does not set things on fire. Most wood has an ignition temperature of 190-260&deg;C - even decayed wood needs 150&deg;C to ignite. <br>The flash point for WD40 is 49&deg;C, which a tea light candle burns at a maximum of 1400&deg;C - as you can see, it easily reaches the WD40s flash point for ignition. Once the hydrocarbons in the WD40 reaches flashpoint, they leave almost no residue of the fine particulates due to their aerosolized nature. <br>You might get some flash charring, but even that is likely with maintained wood. </p>
<p>Which, as I said, is why they can make stoves out of wood.</p>
<p>Can you post a link to a picture of a wood stove?</p>
<p>Here's a closeup shot.</p><p></p>
<p>I don't see it</p>
<p>I went on the hunch you were being sarcastic, which is why the post explaining things.</p>
<p>I am waiting now for someone to build this, and then next some lawyer to file suit against this web site for posting these instructions after someone gets hurt. I have no doubt that some idiot will will build this and misuse it and someone somewhere is going to get hurt. It is not a case of if, it's a matter of when.</p>
<p>Classic!</p>
<p>hahaha good idea</p>
Nothing good will come except: Watching little children running around with smoke coming off of them like when Mario touches fire in Super Mario 64!
<p>The WD40 formula has changed, and will no longer work for this. You might be able to find aerosol hair spray.</p>
<p>Ether will work</p>
<p>won't be better to put a spark generator in the pumpkin rather than candle?</p>
<p>Hmmm - bringing tricks back to Halloween. I laughed my ass off the second I saw this one!! I agree it's a bit... extreme but what a cool idea!!</p>
<p>I made something very similar to this last halloween. I removed the pump mechanism from an electric weed sprayer, and secured it inside a jack o lantern. I also connected a gas tank of lighter fluid to the back of the pumpkin, and extended the battery pack by about ten feet and inside my house. I then placed an ordinary candle inside the jack o lantern, and sprayed flame by activating the pump from inside the house. Not exactly wireless, but you couldn't tell how it was powered.</p><p>The neat thing about this design was that the tank could be filled with any oother liquid such as water or fake blood. The effect was pretty cool.</p>
Thanks for inspiring me. And i try this!
This is great and I'm sure you'll use it safely but pleases remember that many Halloween costumes are very flammable and you will seriously injure someone if you<a href="http://pittsburgh.cbslocal.com/2011/10/10/how-safe-is-your-childs-halloween-costume/" rel="nofollow"> light them on fire</a>.
easiest would be a wire and switch assuming you're smart enough not to want to fire this without being present and watching. also no stray signals could set it off.
easier idea is use 1 of those motion censored air freshners. but angle the tube down ward. an out the front over the candle. uill get the same result. w/o going thro the same programing stuff
to late making it hahahahah take that kids who trash my house i'l use a tripwire hahaah
With arduino and a distance sensor, this could make quite a security system! Don't try this at home or anywhere else though - the idea would make this even more dangerous than it already is!
Neat idea, for sure ... but Arduino is a bit overkill. All ya gotta do is power up the actuator. Even real fancy, use a 555 and the relay to limit the on time (to save baking the pumpkin).
This is a cool project. You may want to place a diode across the coil on the relay to protect the electronics. And depending on the relay a transistor may be needed to handle the current.
I'm rating most of your i'bles 5! Awesome stuff, affordable and compact.
awesome! i wish i had known about this far enough in advance of october 31st to construct it. seems a fairly simple idea just having a remote controllled aerosol can to spray over a flame. i would like to know if there is an easier and cheaper way to set up a remote control system for other projects, i do not have an arduino but surely i can make a transmitter/receiver from basic electronic components or rewiring a remote control car.
RC car would be my suggestion.
I'm working on my own creation for this halloween and i was wondering if you had problems with your candle getting blown out?
I don't think they actually made this, remember?
tooo awesome!
Sweet! Now all you need is a motion/proximity sensor...
a few simple things for a motion prox sensor is to get a cheap motion light from menards or lowes or some store like that and add a relay from 120vac down to what ever your control voltage is this will give you (in test mode) a 5-15 second trip on a 555 ic timer
Maybe next year...
lol... +1 for no warning :)
The problem being you then have to warn people not to get too close... have it inside a cage for example, so the flames won't reach the person
Not that I'm trying to make one of these or anything... But, if I were, theoretically, and the actuator was not, hypothetically, not strong enough to press the spray nozzle, how would I make it? Should more battery power do the trick? <br>
The motor I use is supposed to run of 12V. Hypothetically... A little more voltage / current, would not hurt.
Pretty cool, but the Arduino/XBee is overly complex/expensive. <br>A 1-channel RF remote like this would be much easier/cheaper/faster: <br>http://www.lightobject.com/Multi-function-1CH-RF-with-water-proof-remote-control-P702.aspx
this is probobly the most epic pumkin i have ever seen.... ever
i am geussing you don't get many trick or treaters huh
wow that be so funny to make it work at a angel above trick or tr eater and blow flames

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Bio: My name is Randy and I founded the Instructables Design Studio. I'm also the author of the books 'Simple Bots,' and '62 Projects to ... More »
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