Click here to check if anything new just came in.
November 26 2014
Last weekend I made a 60 bottle wine rack from some 1″ pine. I sized it to fit on a counter top in my basement, under the upper cabinets. I was pretty happy with the design of a somewhat smaller Belgian beer rack I made in the past, so I copied some of its basic style. I really like the strong vertical lines of this design, as it contrasts with the strong horizontals of most wine racks.
With the compound miter saw and table saw, I transformed three 6′ long pine 1″ x 12″ boards into the necessary 150 pieces! The rack holds 60 bottles, so I cut 120 10″ x 9/16″ x 3/4″ pieces. These are connected to 26 uprights that measure 18.1″ x 3/4″ x 1.5″, which are connected to 4 horizontals that are 52″ x 3/4″ x 1.5″. Note that a spacing of 3.1″ is sufficient for wine bottles, but 3.35″ is the minimum for most champagne bottles. Also note that for strength reasons, the 10″ long pieces need to be cut along the grain, not across it. Here are all the pieces, just before I nailed them together:
It took about 1.5 hours to cut the pieces, and 1.5 hours to assemble them. Note that I used a nail gun and 1″ long, 18 gauge nails for most connections, except the uprights to horizontals, where I used 2″ long nails. Check out the completed wine rack, in use!
Let’s say you want to 3D print a scale model of that box of tissues on your coffee table because you want to commemorate being sick last week. You can do that. We can do that. Yes, Milwaukee Makerspace can now scan 3D objects, thanks to our friends at 3D Systems who sent us this lovely Sense 3D Scanner.
When you launch the software, it will ask if you want to scan a person, or an object. (I would have scanned a person for the first test, but everyone was sleeping at 6am.)
If you choose object, it will then ask you what size the object is. I chose ‘Small Object’ for the tissue box.
When the scanner sees the object it will highlight it. You can then click the start button to start scanning. I ended up holding the scanner and my laptop in my hands and walking around the table looking at the screen, trying to keep the object centered.
Here’s our object being scanned. It takes a little bit of practice to walk around with the scanner and laptop. Whenever I’ve seen people get scanned (their heads anyway) they usually sit in a swivel chair and spin while the scanner stays stationary. We may want to try building a turn-table for small objects.
If the tracking gets lost, you need to try to realign things… or start over. It doesn’t take very long to do a scan, so starting over isn’t the worst thing in the world.
Here’s our scan! We now have a 3D model of a tissue box. Exciting!
You may need to do a bit of editing. The most important thing is to ‘solidify’ the model. It needs to be ‘water-tight’ or manifold before you can 3D print it. Solidify fills in the holes.
You can also erase things. The erase tools lets you draw around things with a red line, which it will then delete.
There are a few enhancements you can perform if needed… otherwise, it’s time to save it!
The files are saved as ‘Polygon File Format’, with a ‘.ply’ extension. Typically I use STL files, so we’ll convert to that next.
MeshLab can easily import a PLY file and export it as an STL.
I like to use Pleasant 3D to view and resize STL models. (It’s Mac OS X only, but there are options for other operating systems.)
After making our model a bit more reasonably sized, it’s ready to print! Who wants a hard plastic tissue to blow their nose with!?
November 24 2014
NERP Tonight — Wireless Toys
The Internet of Things (IoT) need lots of options for wireless communication hardware. Lots of variables are involved in choosing the wireless chip or module that links your new Thing to all the other Things.
A popular last millimeter link is UART based serial. the big end of the link can be wifi, or uart-style data., or whatever convention you come up with. This class of hardware has been around for a long time. The serial to wifi link used to be called a com-port redirector. Commercial units could easily cost $200. The competition pressure brough on by the IoT movement has produced a crop of really inexpensive data links. They list now on Amazon for $2-$10. A lot of them have Arduino sample code available. I just bought two different boards from Amazon, and tonight I’ll evaluate one or both units and see what’s involved in making them go.
NERP is not exclusively Raspberry Pi, the small computer
and embedded systems interest group at Pumping Station:One
in Chicago. NERP meets every other Monday at 7pm at Pumping
Station:One, 3519 N. Elston Ave. in Chicago.
Find NERP and Pumping Station:One at
Doors open at 6:30pm. The next meeting is November 24th, 2014.
NERP is free and open to the public.
Ed Bennett ed @ kinetics and electronics com
Tags: electronics, embedded, NERP, Open Source,
raspberry pi, hackerspace, Beagle Bone, Element14, Pumping
As I mentioned last week, the project to build a dynamic scuplture using 480 balls is now called Douglas. What does Douglas stand for, you ask? It is Dynamic Objects Under Gravity Linearly Accelerating in Space. It took 2 minutes to define what the acronym means – perhaps we should have taken longer. Yes, in true Milwaukee Makerspace fashion, we found an acronym first, and then found a definition for it. In addition to this huge accomplishment, we made some other progress too!
Chris sent the slave controller boards pictured below to OSHPark for fabrication. Six (6) boards were ordered as a proof of concept. They should be here by the 30th.
I made a bending jig to get more repeatable acrylic motor mounts pictured in the last update. It’s made out of two 1/2 inch pieces of mdf connected together with a hinge. The two adjustable screws determine the bending angle. Currently, they are set for 90 degrees. But bent acrylic usually “snaps back” as it cools, so it will have to be bent more that the desired final angle. Further experimentation will yield that angle and the adjustable screws will serve as stops for the mdf board. In the picture below, you can see parallel pencil lines indicating depth of the bent “arm” of the mount. The acrylic will butt up again a fence to be placed along one of those lines.
One of the goals of this project is to get kids interested in making by actually building parts of installation. This past Thursday, kids actually cut, stripped, and crimped connectors for RJ11 cables! These four (4) conductor “telephone” cables will be used to communicate between the control boards. I hope to have pictures of this awesome event in the next update.
November 23 2014
Using a beta version of Chef Watson, we will attempt to create whatever wacky recipes come out of Watson’s “mind.” Come join us for some artificial-intelligence driven fun!
The way it works: you input ingredients that you have on hand into Chef Watson, which will then output a recipe for you, usually adding more ingredients. Feel free to bring your own, and we will probably be making a trip to Jewel.
Where: PS:One Kitchen
When: Tonight: Sunday November 23, 2014 at 6 PM
November 22 2014
The class is not only a great way for people to get a feel for the space and our community, but it is also a requirement for joining as you must take the class before joining or within 3 months after joining.
- the one and only rule you need to remember at PS:One!
- what mailing lists and IRC channels you should join
- how to get discounts on classes, tee-shirts, stuff around town, and even monthly dues!
- how to get certified on equipment
- how to donate equipment to PS:One
- how to create a class, event, group, meeting, or what have you
- how to request a class, event, group, whatever
- how to blog
- the wiki.
- do-ocracy and how to do-ocratize things
- Who: anyone who wants to learn more about PS:One and how it works
- When: Sunday, November 23 at 4pm
- Where: PS:One 1st floor lounge
- Cost: free
Here are the class notes – please feel free to read beforehand (Note: these notes are not a good substitute for class attendance).
November 21 2014
What: Soap Making Masterclass
When: Sunday 23rd Nov 4pm
How much: €5 donation to Tog
Soapmaking master Judit Somogyi will be be showing us how to make sudsy artwork to delight
A perfect xmas present for someone special (or someone stinky!)
Come along and learn a simple but powerful new craft
Materials will be provided
<!-- s9ymdb:960 -->
Obwohl Gert van Loo in seiner Doku zu dieser Erweiterung schreibt "If you look
very closely there is a slight pixel crawl", sehe ich da nichts - einwandfreies Bild!
<!-- s9ymdb:961 -->
"Echtes VGA für den Raspberry Pi" vollständig lesen
November 19 2014
Since 2010 Milwaukee Makerspace has partnered with Bucketworks to host a Holiday Make-A-Thon on the Friday following Thanksgiving. What do we do at the Make-A-Thon? We make things of course, but more importantly we make things for the holidays and help children of all ages make holiday items for gifts, decorations or donations.
Typically this event was held at Bucketworks. In 2013 Bucketworks was moving into their new space so the event was held at the Milwaukee Makerspace in Bayview.
The question for 2014 is “where are we going to hold the Holiday Make-A-Thon” or is it Make-A-Thons?
The answer is we can have multiple Make-A-Thons at different locations, hosted by different groups on the same day.
Please join us for the Holiday Make-A-Thon happening at the Milwaukee Makerspace and the Mini Make-A-Thon happening at UberDork Cafe on Friday November 28th, 2014 from 1:00pm to 6:00pm.
This event is competely free and we ask for donations to help cover the cost of materials.
Some of these are tentative and will rely on people to volunteer to make them happen!
- Decorate a laser-cut ornament
- Design a laser-cut ornament
- Learn to solder a tie-pin
- Design & 3D print a cookie cutter
- Make a necklace / bracelet
- Make a rose pin
- Decorate your own gift wrapping paper
- Fold a paper diamond ornament
- Make a woodcut print
Want to bring something delicious to share? Please do!
This month for SIGBOT, we’ll be having a special guest lecturer. One
of our own members, Darold Higa, will be presenting research he did
where he used genetic algorithm techniques to simulate interactions
between agents in settings that resemble our human history. The
Multi-Agent Virtual Histories: Disaggregating International Relations
Phenomena into Networks of Microinteractions
Concerns over the environment, terrorism, ethnic violence and state
disintegration have placed greater emphasis on exploring the possible
connections between resource scarcity and inter-group violence. The
wide range of divergent outcomes resulting from resource scarcity
suggests that the ideational context of resource scarcity is critical
in modeling this relationship. Developing an adequate model of the
relationship between scarcity and violence must therefore contain
elements that can reflect the origins, development and proliferation
of ideas and alternative economic strategies in order to adequately
explain real-world divergence in outcomes. Scarcity as a Complex
Adaptive System (SCAS) is one such model. SCAS uses an agent-based
model featuring cognitively complex agents on a differentiated,
three-dimensional landscape to explore the relationship between
resource scarcity and inter-group violence. In order to demonstrate
the efficacy of SCAS requires translating the model into a computer
simulation known as agentLand. AgentLand features adaptive agents that
learn experientially via Holland’s Learning Classifier System, learn
socially through communication and innovate through random strategy
generation. The resulting virtual histories created by agentLand show
that ideas, geography, density and communication are important, and
the proliferation of different strategies across a landscape of
adaptive agents can create a wide range of outcomes, paralleling
diversity found in the real world. Preliminary results show that by
using an ensemble of virtual histories, agentLand is able to generate
plausible virtual scenarios. Most importantly, this research opens the
door to a different way of conceptualizing and
modeling complex macro-level events as networks of microinteractions.
So, what does this have to do with robotics? Darold is interested in
taking the techniques he used in his research and applying them to the
design of robots. After he gives his talk, we’ll have a discussion
about how we could go about doing that.
SIGBOT is the Special Interest Group for Robotics. We meet every 3rd
Thursday of the month at Pumping Station: One. We talk about robotics
topics and we design and build our own robots.
November 18 2014
November 17 2014
Yes! Friday, 12th December, at 19:30, we’ll meet for the last time this year. We’ll reminisce about our favourite books of the year gone by, and discuss this months book; chosen by random number generator – Gateway by Frederik Pohl.
Gateway opened on all the wealth of the Universe…and on reaches of unimaginable horror. When prospector Robinette Broadhead went out to Gateway on the Heechee spacecraft, he decided he would know which was the right mission to make him his fortune. Three missions later, now famous and permanently rich, Rob Broadhead has to face what happened to him and what he is…in a journey into himself as perilous and even more horrifying than the nightmare trip through the interstellar void that he drove himself to take!
November 16 2014
November 15 2014
We were itching to give our laser cutter a good trial run, when our friends over at Science Hack Day Dublin need some medals created. We started off with their logo and reworked to make it more laser cutter friendly. Check out the results below. If your interested in laser cutting drop by the space sometime.
For a bit of fun, we also made a large sign. Namit is very happy with his work.
Check out the video below to see how they are made,
Maybe Soup is currently being updated? I'll try again automatically in a few seconds...