Jason Morrison's Multitouch Project Log

Jason Morrison hacks up an FTIR display for fun and profit (additionally, for class credit, instant wooing of members of the opposite sex, and a reason to throw around the world “plog.”)

Please expect wildly inconsistent font sizes amidst CSS tweaking, possibly humorous content, and random blathering with occasionally interjected scientific, technical, or otherwise “relevant” information.

Hit up my email at jason dot p dot morrison at gmail.

I love technology, programming, proper quotation marks on the web, and short walks on the beach. (I prefer swimming to strolling.)

(Just give me the linklog, baby.)

•

Sun Sep 27

Osram SFH-485s

One edge

Workspace in my kitchen

Crimping these SOBs killed my fingers!

Completed IR DI frame

Installed into table frame

My point and shoot camera picks up IR!

This weekend, I received a Digi-Key shipment of Osram SFH-485s, a 24VDC power supply, and some resistors. I spent maybe 6 hours planning, sanding/cutting, taping, x-actoing, hot gluing, crimping, and soldering, and the frame came out great!

Next time, I would use connectors that require less force to (1) install and (2) connect. The crimp-on “quick” disconnects are no such thing!

I look forward to receiving a modified Sony PS3 Eye from http://peauproductions.com/store/ with an IR bandpass filter sometime this week, and trying out the setup.

•

Sun Sep 20

Tried http://reactivision.sourceforge.net/ and http://nuicode.com/projects/tbeta but will have to wait for additional hardware before I can get reasonable image quality and tracking.

•

purchase list for new tactile interface experiments

From peauproductions.com :

1 x Camera + m12 Mount + IR BP Filter (OEM) Filter Wavelength 880nm = $80.00

From DigiKey:

100x SFH485 EMITTER IR 880NM CLEAR 5MM 0 0.31680 $31.68
1x T957-P5P-ND TRANS TABLE TOP 24VDC 1A E-STAR 0 19.80000 $19.80
2x CP-2216-ND CABLE ASSY 5.5X2.1MM M/F 3’ 0 3.06000 $6.12
10x CF1/81JRCT-ND RES 1 OHM 1/8W 5% CF AXIAL 0 0.06500 $0.65

•

Wed Dec 10

my next multitouch project is called "project smartlab"

•

Fri Jun 15

Super-cheap IRLEDs with OSRAM SFH485 specs

•

Mon May 7

Project on hold...

The multitouch table is no longer in the scope of my class’s overarching project, so my work on it will go on hold for a while. Likely, sometime around mid-July, I’ll be able to pick up work again, after graduating, traveling, and getting settled at my new job in Boston. Hooray!

•

Thu Apr 12

Video Experiment: Build a Cheap Wide Angle Adapter - Other

•

Digi-Key Corporation -- Part Search

•

Mon Apr 9

Joe ta-daing the final setup of our first installation. See the projector below and, partially obscured, the Sony Digicam used to capture IR. There is black electrical tape to baffle the IR, and tracing paper mounted to the underside of the acrylic with double-sided tape.

•

Joe (right) and I (left) playing the touchlib pong demo.