Rocket finder .. beepers?

Discussion in 'Rocketry Electronics and Software' started by Tom, Nov 2, 2019.

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  1. Nov 2, 2019 #1

    Tom

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    I was wondering if anyone made an in expensive beeper that can be put in low power rockets that makes them easier to find?

    I don't want to spend big bucks on a GPS module, just something simple and hopefully in expensive.
     
  2. Nov 2, 2019 #2

    dmgrime

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    shreadvector likes this.
  3. Nov 2, 2019 #3

    rharshberger

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    Lookup personal keychain alarms, connect one side to the shock cord and the pull pin ring to the parachute swivel or something. For $10 they can be heard a long way.

    https://www.amazon.com/s?k=personal..._9485696&tag=hydsma-20&ref=pd_sl_8g09ghn750_e


    .
     
  4. Nov 3, 2019 #4

    SecondRow

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    +1. I use this setup. I also sanded down the pull pin to make the action smoother. I want the alarm to go off at the slightest bit of force on the pin.
     
  5. Nov 3, 2019 #5

    Joe Rocket 97

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    I use the key chains also, I remove the cheep chains and rings and replace it with kevlar
     
  6. Nov 3, 2019 #6

    Mailman

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    I like the Pratt hobbies micro beacon. Loud enough to get the job done, can get the batteries cheap, blinking light is super nice for night launches!
     
  7. Nov 3, 2019 #7

    Voyager1

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  8. Nov 3, 2019 #8

    Tom

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    Cool I just knew there would be something out there!

    My thanks!
     
  9. Nov 3, 2019 #9

    Tom

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    Hrm put one in my 'cart' and went to check out and got a warning "This is not a secure site, you should leave this page immediately" ! ?
     
  10. Nov 3, 2019 #10

    Mailman

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    They’ve got a phone number posted on the site just give a ring.


    Pratt Hobbies
    11556 Platten Rd
    Lyndonville, NY 14098
    571-221-5820
     
  11. Nov 4, 2019 #11

    H_Rocket

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  12. Nov 4, 2019 #12

    SecondRow

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    I was thumbing through the latest Sport Rocketry last night and saw an ad for this company and their MiniTransBeep:
    https://www.transolve.com/
    Scroll down for it. It is a light sensitive beacon. They have others on their page, as well. I know nothing about the company. Just saw the ad and was reminded if this thread.
     
  13. Nov 4, 2019 #13

    neil_w

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    If the specs are correct, the Mini is very heavy at 2.8 oz. The Micro looks better for LPR at about 0.5 oz.

    I've been threatening to get some beepers for my rockets for two years now, haven't pulled the trigger. Maybe for next year's flying season.
     
  14. Nov 4, 2019 #14

    boatgeek

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    Be advised that rockets with screamers are attracted to power lines by a mysterious force not fully understood by modern physics. Then you'll hear the scream for the rest ... of ... the ... launch. :)
     
    Philip Tiberius D. and Nytrunner like this.
  15. Nov 4, 2019 #15

    Tom

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    I had a thought.

    You know those annoying 'musical' birthday cards that when you open them up they play some music.

    Maybe you could tear one of those open and use the gizmo. What I don't know is if they quit after a few minutes.
     
  16. Nov 4, 2019 #16

    neil_w

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    Not loud enough.
     
  17. Nov 5, 2019 #17

    shreadvector

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  18. Nov 5, 2019 #18

    Tom

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    I actually emailed him about the check out issue. It seems his current web host did not get his SSL certificate updated as they should have and he is looking into a new host / provider.
     
  19. Nov 5, 2019 #19

    Cape Byron

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    DSCF8160 (FILEminimizer).JPG

    Screamers are super easy to make with just a few parts, especially if they are ‘always on’. This one is powered by 2x CR2030 button cells and is the best part of 15 years old.

    Copper track project board from the electronics store makes wiring easier. The board can be cut to size with a Dremel cut off wheel, and unrequired tracks cut with the same tool.

    <edit>

    If you place the speaker downstream of a flashing LED you get a beeper, not a screamer.

    </edit>

    I’m sure lots of people have better and more modern designs, but these simple ones last for years.


    DSCF8163 (FILEminimizer).JPG
     
    Last edited: Nov 6, 2019
  20. Nov 19, 2019 #20

    GalantVR41062

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    I picked up a Vifly Finder 2 for drones. I used one of my 2s lipos to charge it and plan to make a simple power jumper to trigger the buzzer before launch, it has a light sensor and is supposed to stay quite at night but have a flashing blue LED, it may be quite then until apogee, just need to make a lanyard and attach to the shock cord, easy off button once found. I am looking forward to trying this out for local parks and smaller projects this winter.

    [​IMG]

    ~John
     
  21. Nov 19, 2019 #21

    neil_w

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    Hey, that looks like a really nice little unit. It says it doesn't beep "at night", so I'd assume it wouldn't while still in the body tube?
     
  22. Nov 19, 2019 #22

    Charles_McG

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    I use the pratt microbeacon. And I tape the battery in - it's a bugger when it falls out at ejection. I've noticed that sometimes I don't get a good connection - like it's current limited - so I have to fiddle with it to get full volume.

    I also picked up a 'toy' microphone with a parabolic dish, thinking that it would be easy enough to do a sweep while walking. Haven't tried it in the field yet. Has anyone else?

    I've also thought of moving the whole setup into the ultrasonic. I have an ultrasonic leak detector here at work that has a could different directional attachments for its pickup. I thought it might get out of the frequency range of insect noise and into a quieter background.
     
  23. Nov 19, 2019 #23

    neil_w

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    That sounds like a good idea... if you try it out please report on how it goes.
     
  24. Nov 19, 2019 #24

    kuririn

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    Jeepers, creepers, where'd you get those beepers?:D
    I have a Pratt beacon. The led light still goes on, but the beeper doesn't work any more.
    Yes the battery is fresh. Looking for something more reliable. Never launched it.
    Keep in mind that any technology that is "line of sight" will be thwarted if the rocket falls into tall grass.
    Led/strobe lights, ultrasonic, whatever.
    Don't lose a rocket with a loud beeper in a tree or power line near houses, or you will have some very irate homeowners, especially at 2 in the morning. Bad for community relations.
    Laters.
     
  25. Nov 19, 2019 #25

    neil_w

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    The Vifly says it turns off the beeper at night, for exactly that reason. A nifty feature.
     
  26. Nov 27, 2019 #26

    scadaman29325

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    John,

    I found the Vifly Finder 2 on Amazon for $12.

    Is this correct: it monitors the drone's ground and 5v, and when it disconnects due to the drone's battery being ejected it starts beeping? It can also be triggered by spare contact in the drone?

    You mentioned adding a jumper and removing before flight, what pins would be jumped? If you could rig it to pull the jumper at chute deployment, would that work?

    Thanks.

    Screenshot_20191127-181234_Edge.jpg
     
    Last edited: Nov 27, 2019
  27. Nov 28, 2019 #27

    GalantVR41062

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    Yes it's supposed to be hooked up to a drone, but I plan to use the harness provided to charge it, and have a battery hooked up just before launch or final prep of the rocket as the inside of the rocket will be dark and I hope triggers the night time function, I will be attaching it to the recovery harness somewhere.

    >8v to the red wire and ground to the black wire, I am using a 2s lipo to charge it, then a 1s lipo to trigger the beeper before flight.

    ~John
     
  28. Nov 28, 2019 #28

    bibbster

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    John, I'm following your lead, so keep us posted on the progress. I have ordered the Vifly and am awaiting delivery.
     

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