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PICList Thread
'Best chip for a "Kitty Scarer" application'
1998\11\27@151005 by Mark Willis

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Hi, all;  I need to make a "kitty scarer" that detects when one cat of
mine (Kzinnrrhett the stubborn silver tabby) jumps up onto one bookshelf
that she's decided is HER rest stop.

 I've been using compressed air, blown on her, to get her to leave
(That "can of compressed hiss!" is her sworn enemy.)  But she just jumps
up there when I'm not looking, pushes any hapless books that are in
"Her" space off the shelf, pushes on the surround system speaker to push
it further off the shelf, and curls up & snoozes.  Going to break the
speaker some day at this rate...

 I'm thinking of using the 16C84 that came with my PicStart Plus for
this (Could use a 8-pin chip, but /JW parts are pricey & I could re-use
the C84 later once she gives up.  Might as well use it - I'm buying
F84-10's for newer projects, of course.)  Add a 9V battery, a 78L05 or
better regulator, a piezo speaker across 2 pins for nice loud
differential drive, use RC timing, and just whip up some nice white
noise (Mostly high frequency) and play with it until I like the effect,
maybe add a HexFet to fire up a small 12V fan off a separate 9V battery
(to blow air on her - she HATES that! it musses up her butt fur, and she
HAS to be cute, not bedraggled! <G>) - use a capacitive pickup on an
interrupt pin, put some wire-wrap wire on the shelf, and it should work
pretty well?

 Anyone have such a critter already built, or care to comment?  It
sounds about right to me (I could put a 24C65 in there & read in a
sampled actual hiss, but I think a good simulation with white or pink
noise should do pretty well, just making it an unpleasant experience
instead of restful should do this.)  Simpler solutions?

 Mark, spam_OUTmwillisTakeThisOuTspamnwlink.com

1998\11\27@154106 by Peter L. Peres

picon face
I've no idea about the hissing and blowing but from what I have recently
gathered a PIC CMOS input with a 1 MEG series resistor and nothing else
should make a terrific electrostatic voltmeter (as in cat fur, rubbed).

One should periodically turn it to output and drive it high or low
depending on which polarity of electrostatics is to be detected at the
moment ;)

Peter

1998\11\27@160108 by paulb

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Mark Willis wrote:

> Simpler solutions?

 I'd just clamp the 12V computer fan to the shelf, hook it to a wall
wart and leave it running.  Or connect it to a differential dark sensor
to make it "presence detect" if that seems sneakier.  PIC?  I think not!
--
 Cheers,
       Paul B.

1998\11\27@160743 by Craig Lee

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A metal grid and a step up transformer.... low current mind you.

Here's another 'kitty' application I wanted to build.

When I still had a cat. 'Static' would bring all his buddies in for a free
meal.  The free meal part didn't bother me too much, it was when they
decided to mark some territory... and come back on their own.  I had 4
unknown cats free loading at one time!!

Well I think a cat should have the freedom to come and go as they want to,
by nature.  So I built a cat door.

To solve the unauthorized entry, I was going to place a low power
transponder on the collar with a unique ID.  So when Static was close to the
door, he would receive a signal, and then ping it, enabling the door control
for the right cat.  The trick would be
developing sensitive RSSI circuitry and some smarts to decern if more than
one animal was entering at one time.


Craig

> {Original Message removed}

1998\11\27@161315 by Douglas Kilgore KD5OUG
picon face
Non-electronic options:

1.  How about sprinkling some red pepper powder on the shelf but don't
turn the fan on it..  It will irritate her nose and burn her tongue when
she licks.

2.  Buy or make one of the cat trees with a shelf up near the ceiling.

3.  Forget it -  Just whose shelf do you think it is???

A cat lover

Mark Willis wrote:
{Quote hidden}

1998\11\27@161936 by Dave VanHorn

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Give up now, and build another shelf for the books.

1998\11\27@171411 by Bob Blick

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At 03:09 PM 11/26/98 -0800, you wrote:
>Hi, all;  I need to make a "kitty scarer" that detects when one cat of
>mine (Kzinnrrhett the stubborn silver tabby) jumps up onto one bookshelf
>that she's decided is HER rest stop.

I have found that my cat avoids any place she's recently had a flea
treatment given to her. Perhaps you have some ritual your cat hates, you
could bring her over to the bookshelf and do it there?

-Bob

http://www.bobblick.com/

1998\11\27@201709 by Mark Willis

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Good ideas, folks!

 Give up & build another bookshelf, too true!  She's a rescue, from a
horrid home, that's why I don't do worse than the can of compressed
hiss.  Sick people had her, before I took her away from them.  She's
pretty happy here <G>

 Could also use a 555, I've been thinking (Those can be rigged to act
as a proximity sensor, and would run a relay for the fan - more power
hog though.  AC power, I guess.)

 She's a wonderful kitty, like all of ours, just has a few habits
that're obnoxious, like all of ours <G>  I figure that only a machine
can be as stubborn as a cat.  <G>

 Mark, mwillisspamKILLspamnwlink.com

Mark Willis wrote:
>
> Hi, all;  I need to make a "kitty scarer" that detects when one cat of
> mine <snipped>
>   Mark, .....mwillisKILLspamspam.....nwlink.com

1998\11\28@101942 by goflo

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Mark Willis wrote:
>
> Hi, all;  I need to make a "kitty scarer" that detects when one cat of
> mine (Kzinnrrhett the stubborn silver tabby) jumps up onto one bookshelf
Simpler solutions?
>
>   Mark, EraseMEmwillisspam_OUTspamTakeThisOuTnwlink.com

JC Whitney still sells Model T ignition coils ... :)
Maybe an IR sensor and a blower?

Regard, Jack

1998\11\29@180105 by PIC List

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{Quote hidden}

Now I'm not sure if this would work, but I was wondering if you've
considered using sound?
I was thinking of the Motorola Piezo Tweeters that have a frequency response
beyond that of we humans. I'm not sure if this would work and you may be
wanting to use an existing fan, but I know my cat isn't too fond of noise.

1998\11\29@232443 by Tjaart van der Walt

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Mark Willis wrote:
>
> Hi, all;  I need to make a "kitty scarer" that detects when one cat of
> mine (Kzinnrrhett the stubborn silver tabby) jumps up onto one bookshelf
> that she's decided is HER rest stop.
>
>   I've been using compressed air, blown on her, to get her to leave
> (That "can of compressed hiss!" is her sworn enemy.)  But she just jumps
> up there when I'm not looking, pushes any hapless books that are in
> "Her" space off the shelf, pushes on the surround system speaker to push
> it further off the shelf, and curls up & snoozes.  Going to break the
> speaker some day at this rate...
>
>  Anyone have such a critter already built, or care to comment?  It
> sounds about right to me (I could put a 24C65 in there & read in a
> sampled actual hiss, but I think a good simulation with white or pink
> noise should do pretty well, just making it an unpleasant experience
> instead of restful should do this.)  Simpler solutions?

I built a similar circuit to keep our cat off our furniture.
I used an IR beam with a piezo sounder. It worked only for a
short while. I then discovered that my wife felt sorry for
the cat and disabled my "electronic feline educator". So much
for technology...

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1998\11\29@232627 by Tjaart van der Walt

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Mark Willis wrote:
>
> Good ideas, folks!
>
>   Give up & build another bookshelf, too true!  She's a rescue, from a
> horrid home, that's why I don't do worse than the can of compressed
> hiss.  Sick people had her, before I took her away from them.  She's
> pretty happy here <G>
>
>   Could also use a 555, I've been thinking (Those can be rigged to act
> as a proximity sensor, and would run a relay for the fan - more power
> hog though.  AC power, I guess.)
>
>   She's a wonderful kitty, like all of ours, just has a few habits
> that're obnoxious, like all of ours <G>  I figure that only a machine
> can be as stubborn as a cat.  <G>

...hence the expression "To manage programmers is like herding cats."


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1998\11\30@004704 by Gordon Couger

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-----Original Message-----
From: Tjaart van der Walt <TakeThisOuTtjaartEraseMEspamspam_OUTWASP.CO.ZA>

I built a similar circuit to keep our cat off our furniture.
I used an IR beam with a piezo sounder. It worked only for a
short while. I then discovered that my wife felt sorry for
the cat and disabled my "electronic feline educator". So much
for technology...


Have you considered  circuit for training the wife?

Gordon

Gordon Couger RemoveMEgcougerspamTakeThisOuTcouger.com
Owner PRAG-L PRactical AGriculture List  http://www.couger.com/prag-l
Stillwater, OK        405 624-2855   GMT -6:00

1998\11\30@024303 by Eric Smith

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Tjaart van der Walt <tjaartEraseMEspam.....WASP.CO.ZA> wrote:
> I built a similar circuit to keep our cat off our furniture.
> I used an IR beam with a piezo sounder. It worked only for a
> short while. I then discovered that my wife felt sorry for
> the cat and disabled my "electronic feline educator". So much
> for technology...

Time for a PIC-based "electronic wife educator".  Of course, it will
probably have to be much more sophisticated than a feline educator.

1998\11\30@030926 by Tjaart van der Walt

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Eric Smith wrote:
>
> Tjaart van der Walt <EraseMEtjaartspamWASP.CO.ZA> wrote:
> > I built a similar circuit to keep our cat off our furniture.
> > I used an IR beam with a piezo sounder. It worked only for a
> > short while. I then discovered that my wife felt sorry for
> > the cat and disabled my "electronic feline educator". So much
> > for technology...
>
> Time for a PIC-based "electronic wife educator".  Of course, it will
> probably have to be much more sophisticated than a feline educator.

I feel another OT coming on... <G>

The "electronic wife controller" has already been developed with
opamps. The two inputs are commands (inverted input), and money
(non-inverted input). Use compliments as Rf, and socks on the
floor as Ri.

Avoid rail-to-rail output opamps.

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1998\11\30@032002 by Mark Willis

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Tjaart van der Walt wrote:
{Quote hidden}

 Good safety tip there!  I'd think it'd be good to use a couple of back
to back Power Zener diodes to limit output to 3/4 rail or so, actually,
after a 10 ohm or so output series resistor, to avoid damaging the
"driven device"!  We're talking a lot of command outputs here, after
all, based on my experiences with my girlfriend <G>

 Mark, EraseMEmwillisspamspamspamBeGonenwlink.com


'Best chip for a "Kitty Scarer" application'
1998\12\05@171525 by larz
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I recommend you get rid of your cat then before she starts getting
expensive. Simpler solution.

Adios,
LarZ

---------------  TAMA - The Strongest Name in Drums  ---------------


-----Original Message-----
From:   pic microcontroller discussion list [RemoveMEPICLISTKILLspamspamMITVMA.MIT.EDU] On
Behalf Of Mark Willis
Sent:   Friday, 27 November 1998 10:09
To:     PICLISTSTOPspamspamspam_OUTMITVMA.MIT.EDU
Subject:        Best chip for a "Kitty Scarer" application

Hi, all;  I need to make a "kitty scarer" that detects when one cat of
mine (Kzinnrrhett the stubborn silver tabby) jumps up onto one bookshelf
that she's decided is HER rest stop.

1998\12\05@213709 by Mark Willis

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I want to teach my cherished, stubborn kitty, not to go to one place
in the house, not completely rid myself of her presence;

 It would not make any sense, after having taken her away from a sick
family where the mother washed her & her sibling in their washing
machine, to show her children how "powerful" she was; (her sibling died,
Kzinnrrhett survived by holding on to the central agitator, it was
obvious the woman knew what was up as I walked in - so I just took her
away from them, this abusive woman didn't even object).

 After having gotten Kzinnrrhett through healing as much of that trauma
as I can (She still freaks on loud sudden sounds & on being splashed
with water, but she'll come gripe at me as I bathe to tell me it's NOT
SAFE!  Look out!  She's hilarious <G>), why in the world would I get rid
of her?  She is quite a fun character, really cute, and frankly, a lot
less full of malice than some people.

 This suggestion is as good a solution as telling someone, worried
about how they'll send their kids to college, to just kill their kids,
thus solving the problem - it's IMHO, a close approximation to a TROLL.

 Mark, spamBeGonemwillisSTOPspamspamEraseMEnwlink.com, offended...

Tony Antoniou wrote:
>
> I recommend you get rid of your cat then before she starts getting
> expensive. Simpler solution.
>
> Adios,
> LarZ
>
> ---------------  TAMA - The Strongest Name in Drums  ---------------
>
> {Original Message removed}

1998\12\06@094153 by larz

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But I don't treat kids as animals and animals as kids. At least, that's the
way I see it. If it offends you, well, 'nuff said.

Adios,
LarZ

---------------  TAMA - The Strongest Name in Drums  ---------------


-----Original Message-----
From:   pic microcontroller discussion list [KILLspamPICLISTspamBeGonespamMITVMA.MIT.EDU] On
Behalf Of Mark Willis
Sent:   Sunday, 6 December 1998 13:37
To:     EraseMEPICLISTspamEraseMEMITVMA.MIT.EDU
Subject:        Re: Best chip for a "Kitty Scarer" application
This suggestion is as good a solution as telling someone, worried
about how they'll send their kids to college, to just kill their kids,
thus solving the problem - it's IMHO, a close approximation to a TROLL.

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