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Setting of a rocket using a mobile phone — Parallax Forums

Setting of a rocket using a mobile phone

whiteoxewhiteoxe Posts: 794
edited 2010-02-02 15:04 in General Discussion
I had this idea . Using an old mobile phone I was thining of setting off a rocket by rining the phone, the speaker wires I was going to use to power transistors to actvae transistors to send the electronic charge to operate the transistors. I just thought it would be fun to launch the rocket by calling the phone and instead of it rining I would divert the current to operate the transistors ?

Is this far fetched ? (i am not a terrorists, im talking about a model rocket [noparse]:)[/noparse]

Comments

  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2010-02-02 09:31
    It's not far-fetched but probably unsafe. You need to consider the possibility of someone else calling the cellphone at an inopportune time and setting it off prematurely. It would be better if it could answer the phone and respond to a specially-coded DTMF sequence.

    -Phil
  • whiteoxewhiteoxe Posts: 794
    edited 2010-02-02 09:35
    Phil, what is this "It would be better if it could answer the phone and respond to a specially-coded DTMF sequence."

    In particlar DTMF ?
  • whiteoxewhiteoxe Posts: 794
    edited 2010-02-02 09:37
    I didnt make it to Canberra to do a assoc dip in electronic's, i hope to get there for the mid year 2010 intake.
  • GadgetmanGadgetman Posts: 2,436
    edited 2010-02-02 11:40
    Even better would be to send it a specially coded SMS.

    Having it fire the rocket just be ringing sounds REALLY dangerous.
    (Some phones make a lot of noise when they run out of power, among other things... )

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    Don't visit my new website...
  • sylvie369sylvie369 Posts: 1,622
    edited 2010-02-02 11:57
    Hmm. Obviously people do this already, mostly in order to commit acts of violence. As a project, it doesn't sound that interesting to me. I'm very involved in rocketry, and while we use wireless launch controllers occasionally (though not very often), I cannot imagine using a launch controller that could be activated by anyone, even someone not present at the launch. With wireless controllers a LOT of care is taken to make sure that there is only one button that can launch the rocket, and that button is in the hands of the person controlling the launch. I have a wireless controller for ejection charges (used to deploy a parachute when I push a button), and the transmitter box never leaves my hands after the receiver is powered up until both charges have been fired.

    Besides that, you need to be aware that rocket exhaust - either BP or AP - is very corrosive to circuitry. If your cell phone were exposed to it, it would have a fairly short life.

    ·
  • whiteoxewhiteoxe Posts: 794
    edited 2010-02-02 12:17
    Whatever! I dont think your comment about terrorism was called for. But then your probably an american. ops there i go with an ad hominem ! Im just thinking it would be fun to set of some device, maybe not model rockes at the danger of that has been pointed out well to me.

    Post Edited (whiteoxe) : 2/2/2010 12:26:59 PM GMT
  • sylvie369sylvie369 Posts: 1,622
    edited 2010-02-02 15:04
    whiteoxe said...
    Whatever! I dont think your comment about terrorism was called for.
    You're wrong, obviously.

    Have you forgotten that you mentioned terrorism first?
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