Category Archives: Art

Math foods for Pi Day

There are a great many ways to celebrate Pi Day, and food is one of our favorites. While pie is obviously appropriate for Pi Day, there are so many other fun ways to explore math and science through cooking. Here are some of our food projects that can be great ways to explore math concepts on Pi Day:

Happy Pi Day!

Stroboscopic Ornaments

Jiří Zemánek, whose EggBot work we have featured before, sent in this wonderful video of stroboscopically animated Christmas ornaments.

The stroboscopic patterns are designed in MATLAB and drawn by EggBot Pro on colored glass Christmas ornaments. Motion of the balls is controlled by custom mechanism built using components from two Prusa i3 MK3 3D printers, like six stepper motors and two Rambo boards. On top of designing the patterns, which is Jiri’s hobby (when he is not busy with research) and building the whole contraption in a very short time, the team had to deal with issues including non-spherical ornaments, or how to use Rambo board to precisely control the velocity profiles.

We love to see how people make things, and Jiri did not disappoint, sharing process photos of making the rotation mechanisms.

With great help from his colleagues Martin, Krištof, and Filip they took Christmas ornaments to the next level and taught them to dance!

The final setup shot captures how they created such a beautiful video.

Merry Christmas to Jiri and the Advanced Algorithms for Control and Communications group! Thank you for sharing your project!

PCB Etching with AxiDraw

Patricio Gonzalez Vivo has been using AxiDraw for circuit board etching experiments.

He draws on copper clad boards with a Sharpie marker with the AxiDraw.

Drawing is followed by a chemical bath.

The marker is cleaned off of the remaining copper to reveal the design. It came out beautifully.

If you’ve used the AxiDraw for marker masking for etching, we’d love to hear about it!

AxiDraw Pantograph

Mike Jacobs added a pantograph to his AxiDraw to multiply its size range.

Not content with that, he doubled it.

Bigger!!! I extended the extension—now it’s a double pantograph!! The #axidraw #plotter draws ~8.5×12” out of the box. My pantograph increases that to 45×58”. The precision has gone hell and there’s some warping—

Continuing the saga,

Increasing unpredictability! I added a swiveling mini roller. Now I really have no clue what a finished piece will look like, and there’s a good chance that no two pieces will look alike.

It is always exciting to see what creative things people do with an AxiDraw!

Invisible Ink with AxiDraw

Joanie LeMercier has been working on a project using invisible ink and different lighting schemes with the AxiDraw. He has posted a bunch of clips and pictures in his twitter stream with the heading “Invisible drawing.”

Head over to the thread where you can see more progress shots as well as completed drawings.

CMYK Portraits with AxiDraw

Spongenuity has been posting some wonderful portraits made with AxiDraw on instagram, including some CMYK ones like the one below.

AxiDraw on t-shirts

We’ve seen a bunch of posts about using AxiDraw for fabric lately!

Fabric makers and sharpies are both making appearances.

Previously:

Wooden signs with AxiDraw

Jonathan sent in pictures of these wooden signs he made with his AxiDraw.

He shared some tips as well:

  • Put plastic wrap over the surface to test font, spacing, and size.
  • For polyurethane and lacquered finishes, if you make mistake with a permanent marker, write over your mistake with a dry erase marker and it comes right off.

It is awesome to see people taking advantage of AxiDraw’s ability to draw on different surface materials. Thank you, Jonathan!

Lemon Ginger Marmalade

It is lemon season here yet again! Given the quantity of fruit my Meyer lemon tree produces, I have many opportunities to remake my marmalade recipes with little adjustments and changes. This time, I added ginger. Quite a bit of ginger. This jam has a bright cheerful flavor with a bit of zing to it which is perfect for the rainy weather we’ve been having.

Ingredients:

  • 8 cups (Meyer) lemon pieces
  • 1 cup lemon juice
  • 1 cup water
  • 3 Tbsp grated ginger
  • 2/3 cup ginger matchsticks
  • 6 cups sugar

First cut up the lemons into small pieces and remove any obvious seeds. After juicing lemons, we’ve found that straining it through a julep strainer holds back the seeds but allows most of the pulp through.

Our favorite tool for grating ginger is a fine microplane. For making matchsticks, a mandoline slicer makes short work of it.

Put the lemon pieces, lemon juice, water, grated ginger, and ginger matchsticks in a pot and simmer until the lemons start to soften. Add the sugar. Stir regularly and cook to the desired consistency. To test consistency, put a spoonful on a plate in the fridge. If it’s too runny after cooling for a few minutes, keep simmering and test again after a few minutes.

Makes about four pints. If you want to can it for longer storage, Ball has a nice introduction to canning on their website.


Other fruit preserves from the Play with your food archives: