Eye movement controls gaming console
November 05, 2010 // R. Colin Johnson
Waterloo Labs, a team of engineers inside National Instruments (NI), have unveiled the LabView source code to "EyeMario," which demonstrates how video gamers can use their eyes to control Nintendo gaming consoles.
Marrying NI software with electrically isolated data converters from Analog Devices (ADI), enabled the EyeMario reference design, which NI is making available as a free download. Besides gaming, EyeMario will also being adapted to use in the treatment for amblyopia (lazy eye) as well as to empower people who have lost the use of their hands.
"Medically, these measurements are not new, but our use of them for control is," said Chris Culver, an analog hardware engineer and Waterloo Labs team member. "The movie Beowulf used this technique to track the eye movement of actors, which was mapped onto its computer generated characters."
The technique works because the eyeball is polarized like a dipole, with the more negative polarity at the back of the eye where the optic nerve exits. By placing adhesive electrodes around the eye, then measuring its electrical polarity as it rotates to different orientations, the specific on-screen objects that the eye is aiming as can be deduced. Beta testers in Waterloo Labs have been able to control the direction and actions of the on-screen Mario character in Nintendo's games completely hands free.
To safely monitor the delicate dipole-like polarity of the eye—without endangering the user—NI (Austin, Texas) had to use ADI's iCoupler technology, which converts the analog input signal into a 1-bit data stream using sigma-delta modulation. Even an electrical short on the circuit board cannot shock the user, because iCoupler uses on-chip transformers that isolate the sensor's inputs.
"Our data converter is fully isolated—a part of our iCoupler technology," said Steve Hinderliter, converter marketing director at ADI (Norwood, Mass.). "This completely isolates the gamer from the 110 volts power supply in the game console."
The EyeMario prototype used the AD8221 precision instrumentation amplifier to pass the signal from the user's eye to the AD7401analog-to-digital converter on a daughter board with a reconfigurable field-programmable gate array (FPGA). NIs LabView app then measured the eye's orientation, as it moves, and translates that into the signals recognized by the Nintendo game console.
Oscilloscope engine plugs into portable Apple products
September 30, 2014
This month, Oscium is giving away three of its iMSO-204L dual analogue iOS oscilloscopes, worth USD400 each. Designed with ...
BMW joins forces with Baidu for automated driving
Self-tuning acoustic-ready chip increases audio focus
16nm FinFETs boost ARM's 64-bit big.LITTLE
X-ray imaging reveals path to extending battery lifetimes
Electron innovation prolongs power in mobile devices
September 30, 2014
Researchers from The University of Texas at Dallas have created technology that could be the first step toward wearable computers ...
What Is Digital Power System Management?
Qualcomm increases share of smartphone processor market
Aggregating disparate data protocols from IoT
- Solutions for Millimeter Wave Wireless Backhaul
- Enter Linduino
- A Novel Approach to Industrial Rectifier Systems
- Putting FPGAs to Work in Software Radio Systems Handbook
InterviewCEO interview: AMS' Laney on driving a sensor-driven business
Kirk Laney, CEO of Austrian mixed-signal chip and sensor company AMS, wants to leverage the opportunity that technology affords to create new markets for sensors and sensor interfaces.
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Oscium is giving away three of its iMSO-204L dual analogue iOS oscilloscopes, worth USD400 each. Designed with native Lightning compatibility, the iMSO-204L transforms the iPad, iPhone, and iPod touch into an ultra-portable, two-channel oscilloscope.
Since Apple changed its connector, Oscium has been working to bring native compatibility to its customers. The third generation...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.