i was just thinking “hey this is like the phone setup for IEDS”

Ummmm…. last time I checked setting off explosives or incendiaries via wireless was a major no no as far as the BATF was concerned

this sounds like a fantastic way to get a knock on your door from DHS.

@DerAxeman

while that sounds about right, I couldn’t find anything on their page, I did find several fireworks companies selling wireless launching systems though.

Thought I would read the link, and the images are un-cropped.

I don’t know how many people browse on a 2560×1600 screen, but those photos are freaking ridiculous.

Get a mod in that forum.

as others have mentioned this is the most common way to trigger IED’s, I always wondered if it’s possible to broadcast every possible combination of signals to trick a phone into ringing and setting off IED’s prematurely, A vehicle with the equipment could blast out the signal every mile or so, so they can set any of them off at a safe distance.

Please, RESIZE THAT DAMN IMAGES!!! How the hell is possible to publish such large images in a site?

The entire article is totally *UNREADABLE* on eeepc’s and similar computers!

O_o

Bad fucking idea to host this. “Fireworks” Wireless is prohibited even for professionals. Everything has to be wired. Not even closed channel wireless.

This is retarded and extremely dangerous. Head on over to the pyrouniverse forums if you want to learn how to build proper systems with safeties built in that live up to code.

Yeah, theses posts pretty much sum up all the thoughts that went through my head when reading this post — please take it down before some idiot kid gets the wrong idea here, hurting either themselves over the whole ‘wrong number’ thing or hurting someone else…this is something anyone who regulars this site could have figured out on their own, so it’s nothing anyone will lose any sleep over if you yank this….

This was the main argument that my school county had used for the past couple of years as to why cellphones weren’t allowed at school. Fear of remote bomb set off from cellphone triggers.

im not so sure it is a stupid idea. yes the implimentation is stupid. but the idea behind it isnt the fact that you could use the hack for different implementations. cheap remote lock? cheap remote lights? etc etc anything that could be triggered using the pulse.

for a real wireless fireork system try http://www.fireone.com/wireless.htm

REMOVE THIS LAME HACK!!!

What is with all the people pmsing?

First of all, you will notice a on-off switch between the fuse and the trigger which prevents any accidental ignitions before the device is armed. Second, the proposed fireworks trigger (which is only glancingly mentioned, not actually part of the tutorial) involves igniting (not replacing) the fuse, i.e. you have just as much safety delay as you would setting the thing off with a match, while being much farther away.

Could you have a safer arrangment? Always. Is this particularly dangerous? Well, that obviously depends on *what* you are igniting, but for anything you can legally purchase I guarantee it’s safer than lighting a five inch fuse with a match.

Think before you whine.

If hackaday posted one good hack each day, people would check it out and not come back until the next day.

That’s not good for generating money or prestige based on traffic.

In order to increase traffic, readers need to think that they need to check the site many times a day for new posts which may pop up at any time.

So hackaday becomes a bad front-end for instructables, advertisements masquerading as reviews, and reposts of old hackaday articles.

The real value right now is in the comments section but that will change too, I’m sure.

To answer the silly people above:

1. It’s not dangerous. You can configure phones to only ring if called by certain numbers.
2. Yes this is used in bombs, but it’s trivial to do. The first thing police do when there is an unexploded bomb is to block mobile phones in the area.

haku: You might check this out:
http://cre.ations.net/creation/a-tiny-wireless-motion-sensor

Doesn’t use a phone, but same idea.

the images in that thread are resized, but if you have noscript or javascript disabled it doesn’t convert them to thumbnails.

==> do not do this hack <== This is a terrible terrible idea. The least of your concerns is someone accidentally dialing your number. Those disposable cell phones randomly ring to tell you about an offer from the company. Anything explosive or ignitable on a wireless device is asking for danger and trouble from the law.

Let me second the recommendation for http://spatulatzar.com/wireless_detonator/ who put together a slightly safer wireless system. And being a scrap 900MHz phone, probably cost less.

And to ln directly, are you a fellow &t refugee?

Here’s another thought on the “it’ll trigger if anyone at all phones it” problem; if the phone is sophisticated enough, setup a noisy ringtone for only one recognised phone number (the trigger phone) and silence (or vibration) for all other incoming calls.

Did the same thing with an arduino, instead of a thyristor… didn’t really know they existed, but now I want some. I used mine to play the hampster dance in my girlfriend’s dorm room…. not set off a bomb… sorry to disappoint.

Just like subway bombing attack in Madrid.
http://en.wikipedia.org/wiki/11_March_2004_Madrid_train_bombings
They show that – cellphone triggering explosives – on some program on the Discovery Channel.
Notting new. Just a f****** stupid idea.

@Haku i thought in the same solution.

The madrid thing was of course set up largely by the spanish secret service as we know now, I bet that normally terrorist and such would never use a phone really spontaneously, a bit too high-brow for them I think.
As for ‘please remove it before someone hurts himself’, this is an american site, a country where people play with guns.. (and where there is some free speech), I think it’s more useful to make posts about the dangers, and the wrong number risk, and the risk you’ll get temporarily detained (don’t forget that they arrested people for having a LED smiley already) than to be so china-censorship minded.

Try hackaday.cn maybe.

OOOOOOOK. So look, as this may look really really bad, there is a lot of truth in the matter. This particular project uses a VERY poor thyristor design.

When the switch is set to ‘on’, the battery immediately begins feeding current (a LOT of current) to the thyristor, whether or not the cell phone is called.

So, to get this to work, the cell phone must be called within about 2-5 minutes of switching it on or the battery is dead and it will not burn the fuse.

Not the best solution for someone who wants to use it for naughty things….

hey everyone should freak out about this….oh wait.

so, if this was posted as “how to make a remote controlled switch with a mobile phone” it would be ok?

this information exists and posting it here is no more dangerous than google indexing a site that has information. if you type “how to make _______ into google one of the first entries on autofill is “bomb.” People are searching for this already and the information is readily available. Deal with it, free speech ftw.

What about using a relay and the power for the vibe motor?

@jimmys: actually the SSN would suffice for finding someone.

Sweet, now I can build my own roadside fireworks displays! If this had not been posted here I would never have known how to do it because my parents only let my have access to this one site!

yah know, at first I was considering calling for a post removal. this is, as it exists, a bad idea, for a number of reasons, as mentioned by everyone here.

I see the potential for this project to be fine for a number of *other* uses, but fireworks is not one of them. anyone with pyro experience will tell you. several people have defended the project for other uses, and i can agree with them at least on those points.

a marked improvement, that would make it much more reliable and safe, would be to route the speaker jack to an answer and dtmf decoder circuit. this way, the phone would pick up, and listen for a sequence code (or a number of codes, if you wanted multiple triggers). such designs have been around since the 80s (if not before).

the answer/dtmf decoder setup would add a lot to the safety factor, as well as make it far more useful.

mre-
I’m not sure that dtmf works properly over compressed digital audio.

GET OVER IT TERRORISTS STILL USE WIRES TO TRIP THE DAMN BOMBS IF THEY HAVE TO< THIS ISN’T THAT BAD!!!!