Tools, Trash and Technology
A 25-year retrospective of the Art and Design of Marque Cornblatt

The exhibition will include self portraits, interactive sculptures, web-based robots, video, as well as examples of  furniture and interior design.

Opening reception for the artist Friday March 12, 5-8 PM

March 10-April 4, 2010
Wednesday – Saturday 11 a.m. – 7 p.m.
Sunday 11 a.m. – 5 p.m.

For more info and map:
http://www.marquecornblatt.com/balto/

Harbor East on the Circle
The Legg Mason Tower
Retail Suite 102
Baltimore, MD
21202

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We at Gomi Style are pleased to announce the launch of our new sister site: SparkyJr.com.

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Sparky Jr. is a one-stop shop for everything you need to make your own DIY videochat robot. We give you free software, instructions, templates and more – Plus a whole community of people making their own telepresence robots and rovers.  Post your projects, ask questions, and see what others are making.

The Sparky project has been featured in Make Magazine, on PRI’s Studio 360 radio show, and been presented at AFI’s DigiFest, The San Jose Museum of Art, the SFMoMA and museums and galleries throughout the country.

Click Now and join the growing community of DIY Telepresence robot builders

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Sparky uses a Mac Mini and LCD

Over the years, Sparky has gone through many changes and upgrades.  The current version uses a Mac mini  and Lilliput headrest LCD monitor.  At first these components were powered by a small 12v. lead acid battery connected to a DC/AC inverter, but here’s a simple hack for running a them both directly from a lithium ion battery pack.  Since the Mac and battery  both run on DC power, this hack eliminates the DC/AC inverter and the Mac’s brick-sized wall wart.  And the Li-Ion battery is a fraction of the size and the shaves more than 7 lbs. of the robot’s weight.

The new battery is a Digipower, 4.4Ah universal laptop battery from Radio Shack.  It comes with a charger and a bunch of adapters for different laptops, cellphones and PDA’s.   It offers a choice of 16 or 19 volts out, as well as  a standard 5 V USB port.  The Mac Mini requires between 14 and 18 V. and is easily powered from the primary power out, but the monitor is designed to run on 12 V  A little probing on the battery’s internal circuit revealed an onboard 12 v. source, but getting that 12 V. power to the monitor would likely require a hole cut into the case and some sort of adapter hanging out, unless we opted to use the USB out to power the 12 V. monitor.

12 v. jumper wired added go Digipower battery circuit

Jumper wired added to battery

This part of the job was much easier than we originally thought, requiring little more than splicing a single jumper wire on the battery circuit board.  This choice comes with a BIG WARNING however.  USB uses a 5 V power standard.  Rewiring the USB for 12 V. means it will instantly DESTROY any and all USB devices  plugged into it.  It is ONLY to be used as a power source for this 12 V. monitor.  It is highly recommended that you clearly label this USB port so that it doesn’t become a iPod killer or worse.

The only other part of the job is splicing Molex connectors to the Mini’s Power cord and RCA connectors to the monitor. We added connectors to both the original and the new wires so the robot can switch back and forth between the two batteries in just a minute.

Why Molex and RCA connectors?  Two reasons.  First, both connectors are designed to work reliably over and over, and second, I already had them lying around.

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RCA spliced into USB for LCD power cord

Molex spliced on Mac's power cord

Molex spliced on Mac's power cord

Lead acid vs. Li-Ion

Lead acid vs. Li-Ion

In a somewhat scientific head-to-head test of both battery systems, we put them each on Sparky in full running mode.  The original lead acid edged out the Li-ion with a running time of 1:35 to 1:10.

These results are pretty close to each other considering the lead acid is rated at 7Ah and the Li-ion is rated at 4.4Ah.

We also discovered that the Li-Ion runs a bit hot, so Frank suggested cutting a hole in the case, adding a 40mm fan and running it directly from the battery internally – the fan can be powered off the USB’s original 5 v. source, so it’s a fairly straight forward modification.  I’ll update this post when I have pictures of that.

sparky_makeThanks MAKE!

One of the best resources for all things DIY, MAKE Magazine, just published a story I wrote about Sparky, the Autonomous Telepresence Robot project that I’ve been working on since the early 90’s.  

The project has come along way since those early days, transforming from a crude assemblage of found parts and junk into a robust, web-based, mobile telepresence platform that uses cutting edge technology to function almost anywhere. 

There are free instructions and software available at GomiStyle.com, so you can build your own Sparky robot using stuff you probably already have.

Click the widget below to read the whole story.

Look Inside >> 
Volume 16
Programer John Celenza performs as Sparky, the web-enabled telepresence robot

Gomi Style has posted instructions on how to build your own web-enabled telepresence robot, including custom software that is free to modify.  

Click here for the complete Sparky Guide to Web-Based Mobile Video Chat

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