Tag Archives: eggbot

Maker Faire is (almost) here!

Digi-Comp II - 02

The 2012 Bay Area Maker Faire will take place May 19 and 20— just 9 days away — in San Mateo, California.
This is the big Maker Faire, and the best. If you’ve never been to Maker Faire, or if you’ve only been to one of the little ones, it’s an experience not to be missed.

Today (Wednesday, May 9) is the last day to buy advance discount tickets for Maker Faire. If you don’t have your tickets yet, this is a great time to get them.

This year we will again be bringing the Giant Digi-Comp II— our supersized binary digital mechanical computer —to Maker Faire. You can read all about the Giant Digi-Comp II here and see a video demonstration of it here. We will also be doing an Egg-Bot demonstration in the Maker Shed.

Finally, we’ll also be participating in Maker Faire Education Day (Thursday, May 17, for K-12 students).

We hope to see you there!


The Ping-Pong Ball Bot

Ping-Pong Ball Bot

Over at RasterWeb, certified Egg-Bot Operator Pete Prodoehl has written at some tips for using the Eggbot as a machine for decorating ping pong balls:

I found the trick to doing them well […] was to put the ball in with the printed logo aligned directly upwards, and then using the manual control to spin the ball 180 degrees (1600 steps) so the logo is facing downwards so you can center your plot onto the backside where you’ll have the most room and (in theory) the artwork should be centered.

We’ve seen plenty of printing on ping pong balls before— often in the context of beer pong(!)—but these look great, and that’s a pretty neat tip about making sure that the logo doesn’t get in your way.

Link: Ping-Pong Ball Bot @ RasterWeb

StippleGen: Weighted Voronoi stippling and TSP paths in Processing


One of the perennial problems that we come across in a variety of contexts, including CNC artwork and producing artwork for the Egg-Bot, is the difficulty of creating good-quality toolpaths– i.e., vector artwork representing halftones –when starting from image files.

One of the finest solutions that we’ve ever come across is TSP art,” where the image is represented by a single continuous path. You can generate a path like this by connecting all of the dots in a stipple diagram. Designing a route that visits each dot exactly once is an example of the famous Travelling Salesman Problem (or TSP). From the standpoint of toolpaths (for the Egg bot and most other CNC machines), a “TSP” path is even nicer than stipples, because little or no time is spent raising and lowering the tool.

Today we’re releasing a new program, StippleGen, which can generate stipple diagrams from images, using Secord’s algorithm. StippleGen saves its files as editable, Eggbot-ready Inkscape SVG files, which can in turn be opened by other vector graphics programs, or re-saved as PDF files for use in other contexts. It can also generate a TSP path from the stippled image, and either save that path as an SVG file or simply use that path as the order of plotting for the stipple diagram.

StippleGen is free and open source software, written in the Processing development environment. It comes ready to run on Mac, Windows, and Linux, and it is available for download now.

Continue reading StippleGen: Weighted Voronoi stippling and TSP paths in Processing

Winter Holiday Projects from Evil Mad Scientist Laboratories

The Evil Mad Scientist Laboratories Holiday Project Archive!

We’ve rounded up our projects from holidays past and present and will add future projects to this archive each year. You can start with decorations or jump straight to food projects. We’re also including our cookie posts for your geeky holiday cookie making fun.

EdgeLitCard - 49
Holiday Edge-Lit Cards

Edge Lit Cards
Edge-Lit Cards (Refined)

LED decorations

LED Hanukkah Menorah Kit

Special Edition LED Menorahs

Mega Menorah 9000!

Christmas fractal
Christmas Chaos

Ornament with Stars in Eggbot
Decorating Ornaments with the Eggbot

EggBot holiday project roundup

LED Micro-Readerboard spells out MAKE
LED Micro-Readerboard, version 2.0

Gingerbread readerboards
Electronic Gingerbread Men

Ornamental Components 08
Deck the halls with fine components

Component Wine Charms
Solder your own wine charms

Vector Snowflake Application: open-source snowflake generator

Evil new year: Turn your Champagne into a DEADLY weapon!!!!

Clear overview
Easy high-power LED blinking circuit

Star Spangled Biscuits
Spangled Star Biscuits

Five Tricks for Thanksgiving Leftovers

Apple Pie
Now that’s an Apple Pie!

Cranberry Chutney
Indian-style Cranberry Chutney

Pumpkin Spice Truffles

Chocolate Debian
A Chocolate Debian

koch snowflake cupcake
Fractal Snowflake Cupcakes


Fractal Cookies

Atomic Cookies

Asteroids Cookies

Ice Cream Gyoza

Circuitry Snacks

Edible Googly Eyes

East Bay Mini Maker Faire


We’re headed to the East Bay Mini Maker Faire this Sunday, October 16th at the Park Day School in Oakland. And we have a discount code for you! Enter EGGBOT to get 15% off tickets purchased online.

We had a great time last year, and are excited to be taking the Eggbot back for more fun. We’re also bringing along the Ostrich Eggbot, which can fit even larger pumpkins. The lineup of makers for the event looks great, and the schedule includes an all-star cast of presenters, lots of workshops, and three music stages. Hope to see you there!

Photo by smerlo03 on flickr under cc-by-nc license.

Halloween Projects from Evil Mad Scientist Laboratories

The Great Evil Mad Scientist Laboratories Halloween Project Archive!

Halloween is one of our favorite holidays, and our collection of Halloween projects continues to grow. Every fall we update it to include our latest projects for the season. In the list that follows, we’ve organized dozens of our Halloween projects into categories: costumes, pumpkins, decor and food.

Last updated: 10/2019.

Continue reading Halloween Projects from Evil Mad Scientist Laboratories

Eggbot in Cairo at Maker Faire Africa

This awesome picture of Manal holding an Eggbotted egg she has embellished comes to us straight from Bilal in Cairo!

We sent an Eggbot along with our friend Bilal Ghalib to Maker Faire Africa and the 3-day Egyptian Maker Space, which were presented by GEMSI (the Global Entrepreneurship and Maker Space Initiative), and the Cairo Hacker Space.

You can find more about their adventures on twitter by following Bilal and Maker Faire Africa.

Ostrich Eggbot

ostrich eggbot, Closeup

What’s just like an Eggbot but quite a bit larger? The all-new Ostrich Eggbot!

ostrich egg in eggbot with chicken egg for comparison

So yes, just like the Eggbot, it’s a machine capable of drawing on the surface of all kinds of spherical and egg-shaped objects. As the name implies, the Ostrich Eggbot is big enough to (very easily) fit ostrich eggs– one is shown above with a (rather large) chicken egg for scale. And, like the Eggbot, we’re releasing it as an open source kit.

Given all that, we feel confident to suggest that the Ostrich Eggbot may already be quite possibly the worlds finest open-source CNC ostrich-egg decorating machine.

ostrich eggbot

The Ostrich Eggbot chassis is CNC cut from hardwood plywood which is then laser engraved with calibration and assembly marks. Versus the original (standard-size) Eggbot, the feet have been moved to the sides for a wider base to give better stability with differently sized objects.

glass ball

This is a glass ball, 6 inches in diameter, which has been decorated in a motley pattern, with some colored Sharpie markers– it almost looks like stained glass.

Large objects

The range of printable objects extends from chicken eggs all the way up past ostrich eggs, and includes things like christmas ornaments, pool (billiards) balls, and all kinds of egg-shaped and spherical objects from 2.25 to 6.25 inches in diameter. (The blue-green alien-egg looking thing is an emu egg. It fits, too.)

XL pen arm

One of the big challenges in the design was that the new “pen arm” had to be much longer, and consequently to be much, much stiffer so that it doesn’t flex and flop around as the pen is moved.

The new pen arm and its mount have been fully redesigned and are now CNC carved from 1/2″ hardwood plywood, which provides a stiffening member along the side. The top section of the pen arm– where the servo motor and hinged pen holder mount –can also now be mounted at two different heights. The lower register allows plotting on small-diameter objects (like chicken eggs) that would otherwise cause the bottom end of the pen arm to hit the tabletop where the robot is sitting.

Emu Egg in Ostrich Eggbot

The Ostrich Eggbot uses the same pen holders (“distal pen arms” in the jargon) as the original Eggbot, so all the same range of pens, pencils, markers, chalk, and crayons can fit in the Ostrich version too. Especially cool is that the engraver kit still fits, now making it possible to do things like engrave on emu egg shells.

Original Egg-Bot with Ostrich Egg-Bot

Here’s how the Ostrich Eggbot looks next to the original. The original Eggbot just about fits inside the Ostrich Eggbot. The original size is still much better for working with smaller objects like ping pong balls and chicken eggs– but it only can draw on objects up to about 4.25 inches (10 cm) in diameter. The Ostrich chassis doesn’t go as small, but it does go up to 6.25 inches (16 cm) in diameter, and works with much longer objects as well.

The Ostrich Eggbot kit has the exact same “active” components– the same motors and EiBotBoard driver board –as the Original Eggbot kit, so we’re making an upgrade kit available (in addition to the standalone version), for those who already have an Eggbot or want to be able to print on everything from very small to very large objects.

ostrich Eggbot

The Ostrich Eggbot is available now at our webstore.

Documentation for the Ostrich Eggbot is hosted at the Evil Mad Scientist Wiki, as a supplement to the more complete Eggbot documentation, which is also hosted there.