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Making a beacon

Discussion in 'General Electronics Discussion' started by Rehab Doc, Sep 7, 2015.

  1. Rehab Doc

    Rehab Doc

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    Sep 7, 2015
    My daughter has a science project -- she needs to build a beacon that remains dormant until activated by a signal that can then broadcast a unique frequency signal that can range between 100 to 300 feet; the beacon needs to be as small as possible, the size of a quarter or even smaller if possible. Would this be considered a medium range signal? What type of technology would we look at? Garage door signal? Bluetooth? Other? Please help. Thanks.
     
  2. davenn

    davenn Moderator

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    Sep 5, 2009
    what sort of signal is going to trigger it ?
    your size limit is unlikely to be met for a home project ... that would be a challenge even for a hi tech manufacturing company


    Dave
     
  3. Colin Mitchell

    Colin Mitchell

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    Aug 31, 2014
    At the same time the school can request the student make a new Sinclair computer the size of a matchbox and costing less than $30.00
     
  4. Rehab Doc

    Rehab Doc

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    Sep 7, 2015
    Cell signal to trigger; I don't mind contacting a high tech company, any suggestions?
     
  5. Rehab Doc

    Rehab Doc

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    Sep 7, 2015
    Is the chip used for garage opener small? Would that technology work?
     
  6. KMoffett

    KMoffett

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    Jan 21, 2009
    "...I don't mind contacting a high tech company, ..." ????

    Isn't a student science project supposed to be within the capability of the "student"? Seems like she should be the one asking questions here? I can almost always tell when a student project has been overtaken partially or completely to an adult. Especially when you start asking the student questions about the details of "their" project. :(

    Ken
     
    davenn likes this.
  7. davenn

    davenn Moderator

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    Sep 5, 2009
    yup, exactly

    it will cost you $1000's to get a hi-tech company to do it for you and as Ken said totally defeats the purpose of the exercise

    I suggest you look for something that is within the capabilities of your daughters knowledge and skills
     
  8. AnalogKid

    AnalogKid

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    Jun 10, 2015
    Do you have a more clear description of the requirements. It sounds like this can be done with some $3 modules from China - except for that whole cell phone requirement.

    ak
     
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