Pictured above: The natural result if you happen to not tighten the thumbscrew to hold the pen in place: HELLO WOR<ARRRRrrrrrrggggghhhhhhhhh>.
Eric wrote in to say:
It was fun. It was fun to build the Larson Scanner. It was fun because I successfully put it together and it worked as designed. It was so fun I’ll do this again!
In the mid 70′s I attempted to construct a Radio Shack short wave radio kit with a soldering gun. That’s right, I used a soldering gun. Believe it or not, it worked … as a battery heater upper.
Thank you for the helpful instructions and well designed kit. It’s nice to know that 40 years after my last kit, I can drop the battery killer nickname.
Jenslabs has published a thoughtful and thorough evaluation of a number of currently available rollerball and gel pens. He tested them using his Circlon machine.
One thing that anyone who as ever built a drawing machine realizes, is that to get quality results you need a quality pen. There are millions of pens out there, but after a little trial and error I realized that rollerball pens or pens with gel ink are the best pen types for my machine. Both rollerball and gel ink pens use a water based ink that is less viscous then the oil based ink used in ballpoint pens. The Circlon machine sometimes move very fast, so the pen has to be able to release enough ink to make solid lines even at high speed.
I don’t solder the LEDs in. That way I can just pull them back out and make a new sign when I get tired of the current one.
That big pile of LEDs looks like so much fun! He also posted some more sign designs at the end of the instructable.
Our friends at the Exploratorium Tinkering Studio are currently teaching a free online course, Tinkering Fundamentals: A Constructionist Approach to STEM Learning. The six-week course has already started, but you can still join.
It involves pre-installing a plastic dyeing bag at the time of positioning the egg in the Eggbot. Full instructions (with more photos) are in the forum post. Thank you for demonstrating this technique, Ragnar!
…this week we’d like to bring you profiles on women who are roboticists, artists, designers, programmers, and makers of all kinds over the next few days, and we’ll be making an effort to make sure that the women in the maker movement get their fair share of the spotlight as we build our maker community in the future.
In our annoucement article about the EggBot Electro-Kistka — the hot wax dispenser for the EggBot — we noted that it can be challenging to reposition an egg after taking it out to dye the egg between wax layers.
As an alternative suggestion, reader Dan commented:
Could you leave the egg in the EggBot and paint on the first layer(s) of dye with a brush? Then dip the egg for the last layer to get the ends covered.
Well, let’s try and see how it turns out!