- Boris Karloff’s Guacamole Recipe
- Can you fake a TV Remote control with paper and a lighter? Probably not.
- EL wire Nixie Tube
- CatterPlots: Scatter plots, with cats as points
- Convert Inkscape SVG drawings to KiCad footprints
- Double pendulum with UV LED & GITD backdrop (Youtube)
- The Rotating Hallway Scene from 2001, stabilized
- A review of science books for kids, on pages 4-5 of the Reno News & Review Family Guide 2017 including The Annotated Build It Yourself Science Laboratory
- What’s in that Subway Oven Roasted Chicken Sandwich?
Today we are releasing our newest set of “Download and Print” cards for Valentine’s day. This is our fifth year, and fifth set of cards: The 2013 set had six equation-heavy cards, the 2014 set was a set of six symbol-heavy cards, and the 2015 set included love, hearts, and arrows. The 2016 set featured Pluto’s cold heart, and the perfect card for your robotic expression of love.
This year’s set features relativity, atomic orbitals, exponential growth, an LC resonator, and an epsilon delta declaration of love.
“You put me in an excited state.”
Roses are red. Which does suggest that they’re moving away from us, quickly.
While this sounds much like an “epsilon delta proof,” it lacks the logical rigor that we would normally associate with one. It’s more of a postulate, really.
“You make my heart feel like sin(1/x)….” If your heart isn’t jumping yet, you’ve probably never tried to graph that.
The original title for this one was “my love for you grows exponentially.” But hey, your valentine is smart (or you wouldn’t be sending these kinds of valentines): Let them do the math.
You can download the full set here, which includes all 30 designs from all five years (a 1.5 MB PDF document).
As usual, print them out on (or otherwise affix to) card stock, personalize, and [some steps omitted] enjoy the resulting lifelong romance.
- Cool drafting tools: the Keuffel & Esser Trammel Ellipsograph. (See also: 507 movements.)
- Just Add Water: The history of Sea Monkeys, dark side and all.
- Magica: A beautiful solenoid coil driven wooden clock
- An introductory servo control project with ROS, the Robot Operating System
- Dial-A-Grue: Text adventure games with a rotary dial phone
- Another take at weaving string art with a 3D printer
- VisiCut: a userfriendly tool for laser-cutting
- How Canned Mandarin Oranges are made: in Spain and China, and Japan
- The history of the MOS Commodore KIM-1 Computer in pictures
- A jumping sun dog.
- Design and 3D print parametric battery holders.
- Code Combat: An open source programming game for learning how to code.
- 3D print your own (oversized) Curta Calculator.
- Why spaghetti breaks into 3 pieces, via finite-element simulation (YouTube).
- Inside the LM108 op amp on Ken Shirriff’s blog.
- A baby dinosaur tail, preserved in amber.
- Mike’s Electric Stuff tears down a $500k Genome sequencer (YouTube).
- The Brother Type-O-Graph pen plotter.
- If you don’t talk to your kids about quantum computing, who will? (SMBC Comics).
- Single-stroke fonts on the HP1345A vector display and in the movie WarGames (1983).
- How it’s made: Ribbon candy (YouTube, via Neatorama).
- Threadtone: Computational string art
- A sweater for your drone.
Daniel Clifton wrote up a nice article at 101highlandlakes.com about Robert Dering, a retiree who makes batik dyed eggs he gifts to people in his community. The article talks about the process of making them, including using an EggBot.
He started batik egg coloring about 15 years ago after Martha Stewart demonstrated it on her TV show. (Dering said it’s a bit embarrassing to admit he watched the show, but he pointed out he was retired and you never know from where you can learn something new.) The first few were terrible, but he continued, improving with each one.
“I’m still improving,” he said.
For most of those years, he used a small, hand-turned lathe designed for batik egg coloring to pen on a design. It was a bit tedious. But recently, he came across a mechanical device called the EggBot, which does that step for him using a computer program. The program frees up Dering’s creativity. He simply scans a photo or a design into the computer program, which adapts it for the EggBot, which, in turn, draws it on an egg.
There ends the time-saving. Now it’s back to the dying, waxing, and washing.
This year’s card features a snowflake that uses two data points in its generation: how long we’ve known the recipient and the air quality where we’re sending the card. It is unique to the person we sent it to, and no two snowflakes are alike.
After getting some inspiration from dozens of photos of snowflakes, we brainstormed about the different types of symmetry and shapes that would make our design. We then generated the snowflake with a script that draws a certain number of radial spikes based on how long we’ve known the person we were sending them to. Other parameters for the generation rely on random numbers, ensuring that each generated snowflake was completely unique.
They’ve published the code on github, as well as a set of svg files.
Dave K. sent us these pictures of the menorah he built with the Deluxe LED Menorah kit. It’s a one-of-a-kind project, made from scrap wood from his shop.
The base has a cutout to hold the PCB and battery holder, and the LEDs are wired up through the blocks of wood. Thanks for sharing your project, Dave!
We are pleased to introduce the AxiDraw V3, a new generation of our flagship writing and drawing machine.
This new AxiDraw has been redesigned from the ground up for high performance. It features smooth rolling wheels on custom aluminum extrusions, specially designed for high stiffness and light weight. Its sturdy, rigid construction gives it finer quality output and in most applications allows it to operate at up to twice the speed of the previous AxiDraw, which it replaces.
As with the previous version, AxiDraw is a simple, modern, precise, and versatile pen plotter, capable of writing or drawing on almost any flat surface. It can write with fountain pens, permanent markers, and other writing implements to handle an endless variety of applications. Its unique design features a writing head that extends beyond the body of the machine, making it possible to draw on objects bigger than the machine itself.AxiDraw V3 is available to order today, and begins shipping next week. See it in action and learn more on the product page.
- Matchbox cars: 1965 Factory tour video
- Strain wave gearing (like Harmonic drive) as a Lego ball lift mechanism (Youtube)
- Help crowdfund the Open-V, an open source RISC microcontroller
- Disseminating the New Kilogram: An International ‘Dry Run’
- “How we turned $140k on Kickstarter into $40k in debt. And how we broke even.”
- Cat demonstrates Anamorphic 3D cube optical illusion (YouTube)
- Shape Tiler application in Processing — tile shapes for use with WaterColorBot and other plotters.