Dont get so self righteous about animals. Do you drive a car? look at all the poor little animals splattered on your windshield. Get over it.
On Sat, Dec 29, 2012 at 7:58 AM, glasslinger <[email protected]> wrote: > I had the same problem and used an induction coil on the cat food bowl. > Doesn't hurt the cat but they never go back to that bowl again! I wouldn't > cut the cat's whiskers (or claws) off. That is really harming them. > > > On Thursday, December 27, 2012 11:07:29 PM UTC-8, Raymond Weisling wrote: >> >> About 1977 I had two cats and a 24/7 cat flap, but a stray was coming in >> during the night and getting food left for the residents. I breadboarded a >> cat discriminator. It used two telephone relay coils that could detect a >> small magnet passing between them, added to the cat collars and a light >> bulb plus detector (photoresistor). If the magnetic signal was triggered >> and a cat entered, it was a resident, if the non-resident entered, not >> wearing the magnet, it sounded an alarm. I added larger flap made from >> cardboard and a solenoid that allowed the large flap to fall and close off >> the smaller flap so no exit was possible. The no-exit flap solenoid was >> actually manually energized by touching two wires together on the end of a >> cable that ran to my bedroom. Everything was rather crude. I expected that >> I needed it once. >> >> After I installed it I tested it with my cats with and without collars >> and it seemed to work well. >> >> That same night at around 02:00 the alarm sounded, I touched the wires >> together, the larger flap fell and I went out. The non-resident, hearing me >> stirring, made a mad dash for the door and hit the large flap covering the >> bidirectional flap. I tried to catch this panicking cat, and in the process >> the breadboard and the lamp, photoresistor and coils all came undone from >> their temporary mounts. It was a jumble. >> >> The non-resident had to be chased around the house, leaping up at closed >> windows, and eventually I caught him, and trimmed off his whiskers with a >> scissors. This is a very powerful yet harmless reminder since they depend >> on them for feeling for passages that their body can get through. (A fellow >> cat lover told me that once they trimmed off their cat's whiskers and the >> can would be ware of going from room to room in the house especially if the >> door was partly closed leaving a narrow gap.) They will be disoriented for >> some months until new whiskers grow back. A good reminder. >> >> I finally opened the door and released the non-resident, who seemed to >> traverse the back yard that was a least 15 meters (or 40-some feet) long in >> three or four leaps. He never again appeared. The damaged cat discriminator >> was summarily taken apart. I remember using LM324 and LM 339 in the circuit. >> >> One of the cats was a great hunter, and I lived north of the San Fernando >> Valley in foothill areas (Newhall, CA) where some ground squirrels lived. >> My hunter cat, a gentle calico, would bring home slain squirrels and leave >> various parts somewhere in the house as a token of her skill, for me to >> find and clean up when I got home. This happened on a nearly daily basis >> one spring. Eventually it stopped and I found that the nearby colony has >> been totally exterminated by my calico. For a while I had wondered what it >> would take to build a prey discriminator that could block her entry only >> when she carried a victim, but even now I suspect that that is a much >> greater challenge. > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To post to this group, send an email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msg/neonixie-l/-/0BcqG-UuPrYJ. > > For more options, visit https://groups.google.com/groups/opt_out. > > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
