The adventure continues! We had a great turn out at the last ShapeOko build event. Now it’s time to assemble the gantries and do some wiring. Join us this Wednesday July 30 from 7-10PM in PS:One’s shop to see the machine really take shape, and maybe we’ll get to see it move, too. Learn about open hardware and the ShapeOko 3D carving machine. This event is open to the public and is great for newbies and experienced CNC’ers, too.
You are all invited to an exciting night of gambling-free poker!
Players of all skill levels are welcome! We will be playing Texas Hold ‘Em to raise money for the Noise-o-tron kits we will be teaching people how to build at the South Side Mini Maker Faire this Saturday. We provide this demo for free to Maker Faire attendees, and we’d like to keep it that way so we can help educate as many people as possible! Food will be provided; feel free to bring your own drinks.
So how does the gambling-free part work? The entry fee for playing at a table is $10, and you’ll get a stack of chips to play with. When you are done playing, you turn in your chips for raffle tickets. Each dollar in chips that you have will convert to 1 raffle ticket. At the end of the night, we will have a raffle for 1st and 2nd prizes. Don’t worry, you do -not- have to be present at the raffle drawing to win. As long as you’ve turned in your chips, you have a chance of winning. We will notify the winners via email, and you will get your prize ASAP. What prizes do we offer? You’ll just have to wait and find out! We promise that you’ll like them.
Also: We are looking for a third dealer. Justin and I will be dealing all night, but we would really appreciate it if someone would volunteer to help us deal another table.
Rules & strategy links for Texas Hold ‘Em
We will also have printouts of the rules at each table for reference. We look forward to seeing you there!
Where: Electronics Lab
When: Friday August 1st, 19:00-24:00; the raffle drawing will happen at midnight.
Sunday, August 3, 1-5pm
Take a circuit from diagram to breadboard to finished project.
- Learn to Solder
- Read circuit diagrams
- Breadboard a circuit
- Design an LED circuit and solder it to perfboard.
Time: 4 hours
Materials fee: $10
This workshop is for participants who identify as female or genderqueer. Open to both members and non-members of Pumping Station: One.
Taught by Jesse Seay of Columbia College
Register for the workshop at the Women’s Electronics Workshop Meet Up Page.
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.
Tonight at NERP, Craig LeMoyne will introduce the new Raspberry Pi Model B+: the new and improved version of the highly successful Model B. We will have a side by side comparison with the Model B and highlight the changes.
Servo motors are computer controllable motors that do pretty much the same thing as stepping motors. From a systems perspective they have nothing else in common. Servos use feedback to adjust the motor’s position and velocity. The difference between the target speed (or position) and the measured speed (or position) is called error. Without error, the motor has no reason to move. The type of sensor usually used to detect a motor’s position is called a quadrature encoder. Although servo systems can give better performance than steppers in some situations, servos are more complex and more expensive than steppers. Part of the complexity is reading and making sense of the encoder. Adafruit has posted a video in which Drew Fustini has a good job of introducing some techniques for accessing the special eQEP quadrature decoder module in the BeagleBone Black.
A PS:One member (me) has a project that aims to use the BBB’s eQEP to control an Etch-a-Sketch. Tonight I’ll show some of the technology that’s involved and progress on assembling the system.
Find NERP and Pumping Station:One at
Doors open at 6:30pm. The next meeting is July 21st, 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, BeagleBone, Element14, Pumping Station One
Come out to see the recently premiered documentary about the life and struggles of Aaron Swartz, Reddit co-founder and political activist.
“Swartz was involved in the development of the web feed format RSS, the organization Creative Commons, the website framework web.py and the social news site, Reddit, in which he became a partner after its merger with his company, Infogami.[i]
Swartz’s work also focused on sociology, civic awareness and activism. He helped launch the Progressive Change Campaign Committee in 2009 to learn more about effective online activism. In 2010 he became a research fellow at Harvard University‘s Safra Research Lab on Institutional Corruption, directed by Lawrence Lessig. He founded the online group Demand Progress, known for its campaign against the Stop Online Piracy Act.”
There will be popcorn provided, and feel free to bring any snacks or drinks of your own. After the documentary showing there will be discussion, or people can hang out. This is a public event, so bring your friends!
Here is his blog: http://www.aaronsw.com/weblog/
One example of Aaron’s legacy: http://motherboard.vice.com/read/how-aaron-swartz-helped-inspire-lawrence-lessigs-mayday-pac
Legal analysis of the case: http://www.volokh.com/2013/01/16/the-criminal-charges-against-aaron-swartz-part-2-prosecutorial-discretion/
The event was a big success with over 30 people showing up to hear Tim answer questions about IBM’s Watson. Here are some pictures and sample questions (may be heavily paraphrased since they are drawn from my shoddy notes and memory) from the event:
Q: Can Watson pass the Turing Test?
A: Watson has never been given the Turing Test.
Q: Are there plans to build a physical analogue for Watson? (Asked multiple times)
Q: Can you tell us about the specific details of what you do?
A: No, but after Watson was on Jeopardy IBM released detailed documentation
Q: Has anyone fed Watson info about itself?
Q: There seems to be a competition between IBM and Google in the realm of AI. Do you believe that the future will include more mainframe-based AI’s like Watson or decentralized neural network based AI?
A: I’m a big fan of decentralized neural networks.
Q: How do you go about getting a job in AI?
A: I have a CS degree with an AI concentration, and I got an internship with IBM that eventually led to working on Watson. I worked on unrelated projects before this. There’s no set path.
Q: Is there any project to work on improving Watson’s ability to interpret history?
A: There are many NLP (natural language processing) projects that focus on solving that problem.
Q: Does one version of Watson know what other versions of Watson know? (i.e. medical student Watson vs cognitive cooking Watson)
Q: Why is Watson so much better than Siri?
A: Siri is not really an AI aside from its NLP abilities.
Q: What question do you wish people would ask about Watson?
A: You guys ask good questions.
Q: Do you do unit tests and end tests on Watson?
Q: Are there any Easter eggs in Watson?
A: I can’t tell you.
Q: Do you have a button that stops Watson if it turns into HAL?
A: We’ve had no serious thoughts of Watson turning on people.
Q: Watson does not have ontological understanding of the world; any benefit to adding that?
A: We’re working on it.
Here are some related links to the Q&A that Tim shared afterwards:
1.) “Here’s the IBM research journal issue on Watson, that gives away all the tech secrets anyone would want”: http://ieeexplore.ieee.org/xpl/tocresult.jsp?reload=true&isnumber=6177717
2.) Behind a paywall:( “Computational creativity for culinary recipes”: http://dl.acm.org/citation.cfm?doid=2559206.2574794
3.) “This is relevant to cognitive cooking, Florian Pinel is one of the authors, he’s our team lead”: http://arxiv.org/abs/1311.1213
Curious about computer numerical control and open hardware?
Want to meet and help build PS:One’s newest machine? Join us
for a group build of an upgraded ShapeOko 2 CNC router,
donated by Inventables! Everyone is welcome, newbies and
experienced alike – if you can tighten a bolt, you can
assemble a ShapeOko. Please RSVP to the Meetup group or cahira_mirrored [at] yahoo [dot] com, so we
have some idea how many people to expect.
Wednesday, July 16th
Everyone is welcome, although only members will be authorized (at a later date) on the machine once it’s completed.
Hackers frequently need to solve geometric problems for their projects. Whether it’s cutting acrylic on a laser cutter, slicing wood on a table saw, planning the route of a robotic arm on a new 3D printer, or analyzing a polygon mesh in a Python script, a working knowledge of geometry can save time, frustration, and material costs.
This isn’t the geometry you learned in high school, though. This is a crash course in the basic notions of linear algebra, perhaps the most useful branch of mathematics there is.
This course is geared towards demonstrating practical concepts and applications that can be put to use immediately in your own projects. To avoid bogging down the class with tedious details, we will use our computers to perform the calculations for us, allowing us to focus on the big picture and core ideas of each technique we cover.
The only prerequisite for the course is a solid understanding of high school algebra. Exposure to vectors and matrices would be helpful, but not required. There will be a review session before the class officially begins for anyone who wants to brush up on the basics.
Topics for the class:
- A Review of Coordinates, Vectors, Matrices
- Examples of Linear and Affine transformations
- Linearity, Bases, and Where Matrices Come From?
- Square Matrices, Determinants, and Inverses
- Application: Solving Systems of Linear Equations with Gaussian Elimination
- Dot Products, Angles, and Lengths
- Cross Products, the Plane Equation, the Normal to a Plane
- Application: the Line-Plane Intersection Test
- Triangles and Baricentric Coordinates
- Application: the Line-Triangle Intersection Test
- This event is open to the public
- Prerequisite: High school algebra, some light exposure to vectors and matrices
- When: Sunday July 20th at 5pm, review session starts at 4:30pm.
- Where: 3519 N. Elston – 2nd Floor in the Electronics Lab
- Cost: Free
There are many exciting things happening in the shop lately including the ShopBot CNC router and dust collection system. The latter of which I will tell you about now. The dust collection system is a project that Dean is in charge of. He has been diligently staying late in the evenings to work on it, sometimes until 1:00 AM. The dust collection system will be made up of a filter, blower, a Clear Vue cyclone and ducting. The ducting will be attached to the ShopBot, SawStop table saw, band saw, and other tools in the wood shop.
The air will be sucked into the cyclone by the fan, which runs on a 3 phase induction, 5 horsepower motor. It will then be filtered in two stages. The first stage is the cyclone, which will filter out heavier particles into a trash can below it. The second stage will be an actual filter that will trap all the smaller particles. After that, the filtered air will be blown back into the shop.
There is also a Dylos air quality monitor hooked up in the shop that keeps track of the particles in the air. It can be hooked up to a computer via an RS232 serial port for graphing purposes. Besides that, it displays the current readings on both large and small particles. The hope is that the readings will drop significantly after the dust collection system is up and running.
I would like to thank Michael S. for doing the wiring for this and Dean for his many hours of labor on this project. We all hope it will make the shop much tidier and I am certain it will. Also, Dean would like help installing the ducting, which arrived today!
The Hackaday Prize Contest is underway! Community voting has started and will continue until August 4th, which is the deadline for initial submissions. The Grand Prize is a trip to space, while the other prizes are pretty cool too. For example: A milling machine, a top grade 3D Printer and more down to 5th place. There are many minor prizes (read hundreds) as well. I encourage you submit your project on behalf of PS:1 or join a project that has already started. Also see if people want to collaborate on other submissions. The more we submit, the better chances of winning. More importantly, cool things will be made. That’s what what hackerspaces are all about, building stuff with or in a community. Here at PS:1 we have one project already underway with more ideas for additional entries. So far, Greg D. has started the Emergence Project, which combines artificial intelligence, robotics, and evolutionary biology. The results will be “to build a small swarm of robots, give them capabilities similar to that of individual insects, and see if emergent behavior arises through their repeated cooperation and interaction with each other.” The team consists of himself, Jenny, Justin C. and me, Anthony. The next meeting will be this Wednesday, July 9th, at 7-9 PM in the Electronics Area of Pumping Station: One.