Uncovering the Silicon at Bay Area Maker Faire 2019

We had so much fun introducing visitors to what is inside of integrated circuits last year at Maker Faire that we’re going to do it again! For Bay Area Maker Faire 2019 we are excited to be again joining forces with Eric Schlaepfer and Ken Shirriff, along with our new collaborator John McMaster. We’ll again be bringing decapped chips along with microscopes to let visitors see what’s inside of famous and interesting integrated circuits. We’ll also be bringing large scale reference models. Bay Area Maker Faire is May 17-19 at the San Mateo County Event Center. You can check out our Maker Faire page and we’ll hope to see you there!

Spring Sale at Evil Mad Scientist

During our Spring Sale, use checkout coupon code SPRING to save 10% storewide. Save on popular items like the new AxiDraw SE/A3, on soldering kits, EggBot, and everything else too!

It’s a great time to get a shiny new AxiDraw, check out our new accessories like magnetic easels, plan an Easter-oriented robotics project, or stock up on interesting LEDs.

Sale runs through Monday, April 8.

Linkdump: March 2019

AxiDraw at TinkerFest

We’re excited to be bringing AxiDraw out to demo at the Chabot Space & Science Center for their third annual TinkerFest.

Tinkerfest is a one-day festival that celebrates the creative, curious, and innovative spirit in all of us. Tinkerfest brings together makers, artists, and tinkerers to showcase their work while inviting attendees of all ages to join in on the DIY fun! During the festival the entire Center (inside and outside) will be activated with activities that spark curiosity and ignite creativity.

TinkerFest is Saturday, April 13 from 10:00 am to 5:00 pm.

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!

Linkdump: February 2019

Evil Mad Scientist Valentines: 2019 Edition

2019 valentines

Today we are releasing our newest set of “Download and Print” cards for Valentine’s day. This is our seventh year, and seventh 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. In 2017 we featured atomic orbitals, exponential growth, and an epsilon delta declaration of love. The 2018 set featured normal force, stable equilibriums, and something about RPN calculators.

This year’s set features geometry, division by zero, batteries, a nod to quantum chromodynamics, and two very bad puns. (Sorry not sorry.)

Be my Valentine. Any other choice would be irrational.

To the extent that it is important that romance is rational, this is an extremely romantic card.

Roses are red, some quarks are blue. The strong nuclear force is what attracts me to you.

A proton or neutron is made up of three quarks, but its mass turns out to be dominated by chromodynamic binding energy, not the mass of those quarks. Corollary: By weight, humans are almost entirely binding energy.

Unlike most Valentine’s cards, which neglect the vast majority of your potential paramour, this card will let them know that you appreciate more than a tiny fraction of them.

It's hard to define home much I like you. But we should.

I tried to compute my love for you but my calculator gave me an error.

You get me all charged up.

Like a LiPo battery charged at the proper rate so that it does not explode.

You must have taken my electron, because I've got my ion you.

You had better be positive before you give this card to someone.


2019 valentines

You can download the full set here, which includes all 42 designs from all seven years (PDF, 1.8 MB).

As usual, print them out on (or otherwise affix to) card stock, personalize, and [some steps omitted] enjoy the resulting lifelong romance.

Linkdump: January 2019

AxiDraw on MythBusters Jr

I’m super excited to see the new MythBusters Jr episode tonight, because I’m in it with the AxiDraw!


I had a fun time working with Valerie, Rachel, and Elijah, as well as the great crew.