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Sorry for the late update. I just found these in my camera. Of course I no longer remember anything about these projects. If you see yourself or your project, leave a note in the comments.


Marina’s “musical stairs” project is turning into a collaborative effort in true Jigsaw Renaissance style. In these photos, you see Marina, Xandon, Rich, and Budi setting up a test of the Kinect in one of the Inscape stairwells.

Xandon is programming his laptop to play musical sounds depending on where people are on the stairs (as detected by the Kinect). Computers, music, and physical fitness–the project could use more help in all these areas. Come lend a hand Tuesday or Wednesday evening!


SCRoW Report 2/26

by Michael Park, Treasurer on February 28, 2014

in Events

Rich brought along a few iterations of the Hack-E-Bot, a low-cost educational robot he’s developing. Cool laser-cut pieces!

Marina enlisted Xandon to assist in her project to make interactive stairs, the goal being to make taking the stairs more fun. Xandon has a Kinect and has written software to play musical tones as people walk through specific areas, so with any luck they’ll have everything installed in time for the Inscape Open House in March.

Xandon also had a virtual drum kit program that Rich tried out.

In the screenshot you can just make out the colored cubes indicating the “drums”.

If you want to get involved with Marina’s project, come to the next Project Night (Tuesday) or SCRoW (Wednesday).


Pat showed us his Pi hooked up to a webcam and running motion-detection software:

Michail brought a Raspberry Pi-controlled Bitcoin mining rig. Those seven little boards are Application-Specific Integrated Circuits (ASICs)–special-purpose hardware designed expressly for Bitcoin mining. The display shows that it’s generating over two billion hashes per second! A very interesting discussion about Bitcoin ensued.

Stephen has turned his Pi into the beginnings of an inertial navigation system. He had it transmitting six channels of acceleration and roll rate over Bluetooth to his laptop. Soon it’ll be the brains of a Segway-esque robot.

The Raspberry Pi turns two years old this month, so we celebrated its birthday with some raspberry pie (courtesy of Stephen).
Join us next month (3/19) for more Raspberry Pi!


The meeting kicked off with Eva’s RasPi-controlled Christmas tree–very cool!
photo 3
JR’s own Alan W shared his courageous story of getting ssh to work.
photo 4
Newcomer Dennis wanted to get an infrared motion detector working with his Raspberry Pi but didn’t know where to start, so some of the more experienced folks showed him how to edit and run a Python program. In short order he had a rudimentary “alarm” system going.
photo 5
Thanks to all who attended! Next meetup: Jan 15.


Steve found some surgical tubing in the rummage pile in the basement, so tonight during Project Night, he cut up some 2x2s, made loops of the tubing, and with a lot of effort and bruised knuckles, ended up with this example of tensegrity:IMG_0993
Pretty amazing!

In other news, don’t forget the Raspberry Pi meetup at Jigsaw tomorrow (Wed.) night.

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Hello Kitties!

by Michael Park, Treasurer on December 5, 2013

in News

IMG_0977Ceramics artist and Jigsaw member Ling Chun has just put up an installation as part of the Storefronts Seattle program. It’s an interactive animatronic piece consisting of eight maneki-nekos that do “the wave” when people pass by.

Check it out at the Publix Hotel on 5th Ave, just a couple of blocks from Jigsaw.

Here are a few photos of Ling constructing the piece at Jigsaw. Other Jigsaw members provided technical and moral support during the process.

Technical details: Each cat had its innards replaced by a servo, two X-band motion sensors are used to detect the presence of people, and a Parallax Propeller microcontroller drives the system.


A very interesting meetup last night. We had three presentations. First, Rutger gave an overview of RasPi basics for the newbies.
Then Alan told us about BitTorrentSync and how he’s installed it on his Raspberry Pi to make his own personal “Dropbox”-like system.

Finally, Steven showed off something amazing: an old school Mac with a Raspberry Pi for brains. He’s using the Pi’s I2S to drive the Mac’s monochrome video, using PWM to generate sync signals, and DMA to get those two systems in sync. Pretty crazy, but very clever.

Next meeting is Dec. 18. Mark your calendars!

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