Bluetooth Low Energy Changes the “Wireless Landscape”

The Mooshimeter displays a car startup transient.

In 2010, the Bluetooth Special Interest Group (SIG) took Nokia’s existing Wibree standard and renamed it Bluetooth Low Energy (BLE). In doing so, it combined the latest in a series of evolutionary engineering improvements with brute-force market pressure to change … Continue reading






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The Future of Monolithically Integrated LED Arrays

A prototype emissive LED display chip is shown. The chip includes an emissive compass pattern ready to embed into new applications.

LEDs are ubiquitous in our electronic lives. They are widely used in notification lighting, flash photography, and light bulbs, to name a few. For displays, LEDs have been commercialized as backlights in televisions and projectors. However, their use in image … Continue reading






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The Future of Small Radar Technology

Small radar devices such as the RFBeam Microwave K-LC1a radio transceiver cost less than $10 when purchased in quantity.

Directing the limited resources of Fighter Command to intercept a fleet of Luftwaffe bombers en route to London or accurately engaging the Imperial Navy at 18,000 yards in the dead of night. This was our grandfather’s radar, the technology that … Continue reading






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3-D Integration Impact and Challenges

silicon chip

People want transistors—lots of them. It pretty much doesn’t matter what shape they’re in, how small they are, or how fast they operate. Simply said, the more the merrier. Diversity is also good. The more different the transistors, the more … Continue reading






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The Future of Inkjet-Printed Electronics

This single-sided wiring pattern for an Arduino microcontroller was printed on a transparent sheet of coated PET film, (Photo courtesy of Georgia Technical Institute)

Over the past decade, major advances in additive printing technologies in the 2-D and 3-D electronics fabrication space have accelerated additive processing—printing in particular—into the mainstream for the fabrication of low-cost, conformal, and environmentally friendly electronic components and systems. Printed … Continue reading






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The Future of Nanotube Computing

Max Shulaker, a graduate student at Stanford University and author of this essay, holds a wafer filled with CNTs. (Photo: Norbert von der Groeben )

For decades, silicon-based transistors have been the workhorse of the semiconductor industry, achieving remarkable advances in computational power. While advances continue to be made, alternative technologies are being explored to increase computational power and efficiency beyond the limits of silicon. … Continue reading






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Low-Cost SBCs Could Revolutionize Robotics Education

rover_web

For my entire life, my mother has been a technology trainer for various educational institutions, so it’s probably no surprise that I ended up as an engineer with a passion for STEM education. When I heard about the Raspberry Pi, … Continue reading






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Natural Human-Computer Interaction

This shows the hand tracking result from Kinect data. The red regions are our tracking results and the green lines are the skeleton tracking results from the Kinect SDK (based on data from the ChAirGest corpus: https://project.eia-fr.ch/chairgest/Pages/Overview.aspx).

Recent innovations in both hardware and software have brought on a new wave of interaction techniques that depart from mice and keyboards. The widespread adoption of smartphones and tablets with capacitive touchscreens shows people’s preference to directly manipulate virtual objects … Continue reading






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3-D Printing with Liquid Metals

3-D printing with liquid metals: a line of dolls

by Collin Ladd and Michael Dickey Our research group at North Carolina State University has been studying new ways to use simple processes to print liquid metals into 3-D shapes at room temperature. 3-D printing is gaining popularity because of … Continue reading






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The Future of Very Large-Scale Integration (VLSI) Technology

Chris Kim

The historical growth of IC computing power has profoundly changed the way we create, process, communicate, and store information. The engine of this phenomenal growth is the ability to shrink transistor dimensions every few years. This trend, known as Moore’s … Continue reading






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Video: 3-D Printing with Liquid Metals and Flexible Electronics

3-D printing with liquid metals: a line of dolls

In the October issue of Circuit Cellar, Collin Ladd and Dr. Michael Dickey will be writing an essay about a North Carolina State University group’s fascinating research into 3-D printing with liquid metals. “Most 3-D printers currently pattern plastics, but … Continue reading






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Using Socially Assistive Robots to Address the Caregiver Gap

The socially-assistive robot

Editor’s Note: David Feil-Seifer, a Postdoctoral Fellow in the Computer Science Department at Yale University, wrote this  essay for Circuit Cellar. Feil-Seifer focuses his research on socially assistive robotics (SAR), particularly the study of human-robot interaction for children with autism … Continue reading






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The Growing Importance of Control Theory for DIYers

Brian Douglas

Control system theory is a branch of engineering that handles how to manipulate a dynamical system’s inputs to change the behavior or outcome of the system to something that is desired. The concept is simple enough to understand. In fact, … Continue reading






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Linux Home Automation

Neil Cherry

My first home automation (HA) project included an Atari 800XL, a Heathkit X10 interface, and the “Build the Home Run Control System” article series from Steve Ciarcia’s Circuit Cellar column (BYTE, 1985). I was forever hooked on HA. Eventually, I … Continue reading






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The Future of Open-Source Hardware for Medical Devices

Fergus Dixon's embedded DNA sequencer project (Source: F. Dixon)

Medical technology is changing at a rapid pace, but regulatory compliance is also becoming increasingly harder. Regulatory compliance can act as a barrier to innovation, but it is a necessary check to ensure quality medical care. For small companies, aligning … Continue reading






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