Tag Archives: cats

Cardboard Cat Chaise Roundup


photo by Caitlin Burke

Lots of folks have been making our cardboard cat chaise to mollify their feline companions, so we thought it was about time for a round up.

  • abehman made one and painted it red to complement Alowishus’ lovely shade of grey.
  • Blog of Fun padded theirs with The Kid’s favorite bath mat.
  • scottb12t3 on flickr caught Toby using his.
  • odyniec.net used this as an excuse to make a unit conversion script since he prefers metric (can’t blame him).
  • Empty-handed‘s chaise clearly got immediate use.
  • Caitlin not only put Mr Bun’s chaise on Thing a day, but also augmented it with the tasseled cushion you can see in the photo above.

If I missed yours, drop me a note in the comments. And if you make one, we’d love to see it in the flickr auxiliary!

Update: Here are more:

Fishbowl Cat Quilt

Fishbowl cat quilt27

Like cardboard, cats love quilts.

My grandmother made my mother a lap quilt to keep handy in the living room, but whenever my mother wanted to use it, there would be a cat sitting on it. So my grandmother made a simple cat quilt out of four squares of leftover fabric. The cat always had a quilt to sit on, so the lap quilt was free for my mom.

In that spirit, here’s a simple fishbowl quilt you can make for your feline companion.

Fishbowl cat quilt29   Fishbowl cat quilt31
Continue reading Fishbowl Cat Quilt

Cardboard Cat Chaise

Harley Sleeps

Although we don’t claim to understand it, a cat that has installed itself in a cardboard box is a happy cat. You can exploit this mysterious fact to make a your own simple corrugated cardboard cat bed like this one, designed as a kitty-sized chaise lounge. Since it’s just cardboard, it’s also easy to modify this basic design to suit your own (or your cat’s) taste.
Continue reading Cardboard Cat Chaise

20 millicenturies of Evil Mad Scientist Laboratories


Happy birthday to us! Evil Mad Scientist Laboratories is now two years of age. Collected below is a “Best of Evil Mad Scientist” for the past year: Some of our favorite projects that we’ve published over the last twelve months. Here’s to the next year!

Quick projects:

Set of bands
Rubberbands made from old bicycle innertubes.

vertical light tent setup
Light tent made from a lampshade.

Still life with yellow paper (group shot 2)
Chip bugs


Spool spinner from an old fan.

Quick C to D adapter
The $1.00 C to D adapter

Electronics projects

Weekend Projects Podcast!
How to make a Joule Thief from Make: Weekend Projects.

lights off?
How to make a dark-detecting LED night light.

The Great Internet Migratory Box Of Electronics Junk
The Great Internet Migratory Box of Electronic Junk

Finished 1
How to make a Sawed-off USB Key

AVR microcontroller projects

Using an ADXL330 accelerometer with an AVR microcontroller

Snapper - 09

Kit Projects

AVR Target Boards

Four Panels 2
Interactive Table Kits

Resist1- Wall hanging

Peggy v 2.0

Crafty Projects

Q*bert close-up

vintage software book handbag
Software Handbag

iPod inside
iPod cozy

Earrings 2
Fimo Fractals

Miniature Art Car
Mini Art Cars

New wing
Umbrella Bat Costume v 2.0

Food Hacking

Cooking hotdogs

555 LED flasher 1
Circuitry Snacks

Googly FSM
Edible Googly Eyes

Sierpinski Cookies-11
Fractal Cookies


Sugar Chain
Printing complex shapes: Sugar Chain

Before and after 2
Candyfab improvements: higher resolution and edible output


Usage 3: First operand
Rotary Fraction Adding Machine

toner - 15
Electric Origami

Observations & silly projects:

Cat volume computation
Volume of a cat

Pacman Halloween

Lego Projects:

Lego Shooter
Forbidden Lego review & build

Technic Bits
Efficient Lego Storage


suction tool
Obscure electronics tools

Lee Valley & Veritas catalog
Lee Valley & Veritas Catalog Review


Twisted leads (close-up)
LED Stoplight

All the parts
hp2600n - 178
HP Color LaserJet 2600n

Computing the volume of a cat

Cat volume computation

How do you compute the volume of a cat?

Dunking it in water doesn’t work– you only get the volume of the rat-like creature that lives inside the cat; much like the feeble alien within a Dalek. (And, if your answer had anything to do with contour integrals, get real.)

Here is a low-tech method that works: Using successive approximation, determine the smallest box that the cat will fully enclose itself in, and measure the size of that box. Cats tend to leave a few appendages hanging out of the corners– you may need to assist with folding the cat into the box for the final stages of approximation.

This cat is approximately 648 cubic inches in volume.

JellyBean versus the Digi-Key packaging materials

JellyBean versus the Digi-Key packaging materials

Digi-Key is a great place to order electronic components. Their online search is great, they ship quickly, and their prices are reasonable. If you have cats, there’s one more good reason to order from Digi-Key: They use interesting environmentally friendly packaging materials.

A day when a Digi-Key box arrives is a red letter day at our house. I get the components in the box, and the cats get everything else, and those are (apparently) some extremely exciting packaging materials. Typically there are layers of both white tissue paper and perforated brown kraft paper. Both types are krinkly– which cats are really into for some reason– but the brown perforated stuff is a particularly special treat. Our two cats will perfect their running leaps to pounce on it. They will fight over it, where the victor gets to roll around in it and get cozy inside– as JellyBean above has done.

Why? Well, I’m no feline psychologist, but I’ll take a few guesses as to why it’s so popular: (1) it’s easier to sink teeth and claws into than regular paper, (2) it’s more flexible, (3) it tears more easily, (4) if you’re hiding in it, you can still see out, (5) it’s very krinkly, and (6) it slides well on the hardwood floor.

All in all, it’s much better than a plain cardboard box, although they often get that too.

Art lamp and JellyBean: Separated at birth?


We made– and sold (!)– this art lamp a couple of years ago. It’s a life-sized hollow glass head glued to an aluminum base. Inside the head are two long, tangled, strands of multicolored christmas lights, each with a bimetallic “blinky” bulb. The two halves switch on and off quite irregularly in an animated effect that seems much more complex than the simple electronics should have produced. The end effect is a bit like neurons firing, or perhaps like the brain from a cheesy tv robot.

In this photo, JellyBean is sitting on the top of the bookcase with the lamp and is doing her best to blend in with the surroundings– cats are good at that.
See more pictures of the Evil Mad Scientist Laboratories Feline Auxiliary here.