Blow off your Monday and come watch the edge-of-your-seat landing of the Mars Curiosity rover! Help us celebrate its successful landing or weep inconsolably with us if it splatters all over the Martian surface! We’ll get together, talk a little about some of the ways we’ve seen both success and failure in Mars exploration in an effort to provide context, and then settle down to watch NASA TV report on the telemetry stream that will indicate success or failure.
If you don’t know, the EDL cycle for the Curiosity rover is insane. Landing this rover will be an amazing accomplishment. Check this video:
TomG shows how he etches PCB boards using paint, a 25W laser cutter, Muratic Acid, 30% H2O2 and a sponge. Much frothing ensues.
The technique is a neat one, given the presence of a laser cutter, because it can take you from copper clad to etched board in a pretty quick amount of time.
One note, the Muratic Acid is actually from a pool supply store, not Home Depot. It is, of course, dangerous. Wear safety goggles, use gloves, use in a well ventilated area. (The acid smells like a punch to the nose, don’t inhale it)
On April 17th, 2012 at 7PM we’ll have Suzanne Fischer, Associate Curator of Technology at the Henry Ford Museum here at the space to talk to us about the Maker Faire Detroit. Come on by and learn more about it! As always, Tuesday evenings are free and open to the public!
Dave Jones over at EEVBlog posted his design for a simple soft power circuit. This is something I looked at a couple of years ago in my own un-expert way. I really like Dave’s design. It’s just so simple and draws basically nothing when off. It’s something I definitely want to file away in my library of circuits as I can see it coming in handy quite often.
If you are not familiar with EEVBlog you should check it out. Dave’s series of videos are fun to watch and you often learn something.
Bill M, Bret D and I went by Dan Dricken’s studio this past Sunday to watch his aluminum pour. It was great fun to watch. Dan has a custom built furnace with a 40lbs crucible. Audience members prepared sand scratch blocks. They were shallow square that participant carved designs into to form an aluminum tile.
I learned that there is really quite a close-knit community of metal pourers. Bret D is going to help us out making our own aluminum furnace and eventually even an iron furnace. I’m really looking forward getting more involved with that community.
Here at Art Milwaukee’s big shindig at Flux Design. Man, I’ve done a lot of talking. Gave away the last of our complete tie pin kits. Met lots of great folk in Milwaukee’s art community. Mad props to Jason H to getting Milwaukee Makerspace more involved with this community. I really feel like there is a lot of potential for awesome interaction between makers and artists and events like this one can make that happen.
For a couple of years my wife co-ran Milwaukee’s Food Not Bombs movement. She has always had fond memories of that time and has on more than one occasion brought up their logo: a hand clutching a carrot. So, I decided to make her a pendant with a relieved carving of that logo. To begin with I pulled the jpg logo into Inkscape loaded with the Better Better DXF Output plugin. I used the Inkscape drawing primitives to trace over the major outlines of the logo and then export the tracing to DXF. Once in DXF I imported the file into CamBam where I cleaned of the drawing a little more and defined machining operations for our CNC Router to perform. I turned the outlines into a series of adjacent polygons. (e.g. a wrist polygon, a thumb polygon, etc.) I then setup pocket operations of varying depths on each polygon. Finally, I exported the file to G-Code for consumption by the Mach 3 router control program.
If you look you can kind of see the polygons even if the depth setting of each pocket is not apparent.
Above you can see the pendant in the process of being routed out and also the finished wax mold after routing. Below you can see the pendant after casting! She loved it and wears it frequently. I was a really good feeling to actually put some effort into making a gift this year. It made the act of giving the gift that much more special.
I also completed the Star Trek logo. I turned that into a broach.
Above you can see that I have mounted the Star Trek logo to a plastic backing. I’ve also cut one of Adafruit’s EL Panels way down in size and hooked it up to another one of her small inverters. The small inverter normally cannot run her panels, but after being cut down so much, it wasn’t a problem. Below you can see the two pieces put together.
And finally the finished gift!
As I said, I really enjoyed giving gifts that I made this year. I am going to try to do more of that!
Tonight we successfully spin cast a few bronze models! This is the first time ever, at the Makerspace. I’m totally stoked to have a new and neat piece of equipment operating here. Spin Casting now joins one of the many skills you can learn here.
Below you can see JasonH taking the torch to the bronze sitting in the crucible.
Neither JasonH nor myself have any real idea of what we are doing, but we gave it a try and it turned out! Below you can see the Star Trek logo that came from the wax mold I posted about earlier as well as bits of the sprue. It still has a good bit of investment stuck to it, but I’m out of time for tonight.
Below is a video of the spin caster in action. You can see the red glow of the molten metal being driven into the investment cavity.
I got my BeagleBone in today! In brief it is a high speed (720Mhz) ARM development board that takes a lot of inspiration from Arduino. At 720Mhz, however, there is plenty of juice to run Angstrom Linux or even Android.
It comes with a Linux SD card so I fired it up an gave it a whirl. Out-of-the-box the board runs a web server that runs Node.js and serves a web-IDE called Cloud9. They’ve set up Node.js libraries to make the programming look a whole lot like the Arduino. Check it:
They say it’s not quite ready for prime time and won’t be until sometime in 2012. But the blinky light program worked just fine. Seems like they are off to a great start.
I am thinking about this device as a fixed function server that will serve up a configuration GUI for my access control system and poll the door readers. Right now the Access Control server runs on a normal Ubuntu server, but in a commercial application you’re going to get folks who just plain have a black thumb with computers. These folks can be a real drain on support. This BeagleBone device could possibly be made black-thumb proof.
September 26-27 at Wisconsin State Fair Park, the same weekend as Harvest Fair. Admission is free. Maker Faire Milwaukee's Call for Makers is now open.
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