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Practical Joke (Mini Cricket) — Parallax Forums

Practical Joke (Mini Cricket)

Microman171Microman171 Posts: 111
edited 2010-02-24 02:36 in Robotics
I bet this could drive someone insane!nono.gif

It's a mini cricket and when it gets dark enough it starts up smilewinkgrin.gif
I built this based on a PDF I found www.wenzel.com/pdffiles/april1st.pdf

I like being annoying tongue.gif

See attachment for schematic
Cricket.gif
433 x 354 - 5K

Comments

  • Microman171Microman171 Posts: 111
    edited 2005-04-28 10:15
    Micro again forgot the code

    play with the "time = 3500" smile.gif

    bye for now

    Microman171
    bs2
    bs2
    Cricket.bs2
    503B
  • bishopbishop Posts: 82
    edited 2005-04-30 17:49
    hehehe...



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    **************

    daniel woolston
    Teksystems Inc.
    www.danwoolston.com
    **************
  • MacGeek117MacGeek117 Posts: 747
    edited 2005-05-01 16:55
    I built the circuit and have already driven my mom bananas with it.
    bugg

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    Boe-bot: $229


    Toddler: $249

    Learning Google is your friend: priceless
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2005-05-01 17:51
    There's a surprise... are you sure it was the cricket that did the damage? tongue.gif

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    Jon Williams
    Applications Engineer, Parallax
    Dallas, TX· USA
  • MacGeek117MacGeek117 Posts: 747
    edited 2005-05-01 21:17
    Now that you mention it...

    Yes, it was!
    bugg

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    Boe-bot: $229


    Toddler: $249

    Learning Google is your friend: priceless
  • boeboyboeboy Posts: 301
    edited 2006-05-31 00:34
    that is cool keep up the good work!!
  • BergamotBergamot Posts: 185
    edited 2006-06-08 02:21
    But when they actually do find the circuit (and they will, eventually) it will likely end up in little bits.

    Would you wish that on your precious Stamp?

    (You could also add a photosensor to only beep when the lights are off, making it much harder to find.)
  • WhelzornWhelzorn Posts: 256
    edited 2006-06-16 02:43
    The attached picture is a schematic of one I build often for friends (I based it off a basic astable multivibrator). It stays quiet for about 4 minutes and then emits a ~1 second beep. I suggest this as an alternative to wasting a basic stamp, as this costs $2 max (plus the cost of the buzzer). Just take care to ensure that the components you choose are rated to handle the voltages you plan to drive the buzzer with. I used 10v caps and 1/4watt resistors. The transistors were just 3904's. I used a 4100Hz buzzer and it was practically impossible to tell which direction the sound came from. Just remember that chances are pretty good it will be found eventually and whoever finds it will not be too happy, so consider these disposable.
    by the way, teachers love them.
    bmp
    bmp
    MM.bmp
    19K
    MM.bmp 18.8K
  • willthiswork89willthiswork89 Posts: 359
    edited 2006-07-22 04:28
    haha i got it in my grandparents room and they are trying to "find it" haha they had me helping them try to find the cricket! i added a 2k ohm resitor to make it very faint as if its somewhere deep in the crevises of the bed, and added a counter with a 10 second delay after it chirps so many times. to make them think its stopping chirping because they are in there... its practically real sounding
  • Joe FishbackJoe Fishback Posts: 99
    edited 2006-07-27 19:35
    Willthiswork89,

    Can you post a diagram and parts for the timer you added to the Beeper?

    Thanks

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    ······ Joe Fishback

    -Robots are my friends-
  • SSteveSSteve Posts: 808
    edited 2006-07-27 21:11
    Here's a version I made. It throws in some randomness to the timing and stops chirping for 15 seconds after every 10-15 chirps. It uses the same circuit as the original.

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    OS-X: because making Unix user-friendly was easier than debugging Windows

    links:
    My band's website
    Our album on the iTunes Music Store
    bs2
    bs2
    Cricket.bs2
    907B
  • willthiswork89willthiswork89 Posts: 359
    edited 2006-07-27 21:24
    Joe all i did was do counter var word

    run through the chirp and add 1 to counter
    if(counter = 15) then
    counter = 0
    pause 30000
    endif
  • Kaos KiddKaos Kidd Posts: 614
    edited 2006-08-15 20:09
    lol...
    I'll have to make one for my cats...

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    Propeller + Hardware - extra bits for the bit bucket =· 1 Coffeeless KaosKidd

    ·
  • jblavenjblaven Posts: 36
    edited 2007-03-20 05:24
    Way cool! lol.gifjumpin.gif

    My son and I will have fun with this!
  • boeboyboeboy Posts: 301
    edited 2007-04-05 17:40
    I used it on April foolsdevil.gif my brother thought he was going nuts lol.gif

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    lets see what this does... KA BOOM (note to self do not cross red and black)
  • LogicalsifterLogicalsifter Posts: 12
    edited 2007-04-07 00:10
    HAHAHA killer idea!
  • BobotBobot Posts: 8
    edited 2007-06-16 04:23
    Yea... going to have to try this one.
  • GranzGranz Posts: 179
    edited 2010-02-24 02:36
    Nice idea!

    Real crickets (the bugs) use temperature to determine their chirp rate (chirps per minute). Add a simple thermistor circuit and then, as the temp goes up, the delay between chirps can go down. This will make it sound more like "the real thing"

    Art
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