CC 277: (Re)Discovering Embedded

Closeup of the Raspberry Pi

Authors in this issue range from a columnist who reintroduces us to the advantages of switched-capacitor filters to a frequent contributor who discusses his first encounter—and project—with the credit card-sized Raspberry Pi computer. Columnist Robert Lacoste recently rediscovered one of … Continue reading

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CC276: Not a Hockey Fan?

SMD

Hockey can be fun, unless you’re building a surface-mount device (SMD) prototype and the “puck” is one of the tiny components getting away from your soldering iron. In an article appearing last month in Circuit Cellar, “DIY?Surface-Mount Circuit Boards: Tips … Continue reading

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CC275: Shape The Future

Tech the Future essayist Fergus Dixon designed this DNA sequencer, the subject of an article in the May 2013 issue of Circuit Cellar.

In January, Circuit Cellar introduced a new section, Tech the Future, which dedicates page 80 of our magazine to the insights of innovators in groundbreaking technologies. We’ve reached out to a number of graduate students, professors, researchers, engineers, designers, and … Continue reading

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CC274: A Sensory Experience

An Atmel ATmega88 microcontroller is at the heart of the CNC router controller.

The May issue of Circuit Cellar provides a number of articles focusing on how to utilize measurements and sensors in your designs. Knowing how to generate a magnetic field to calibrate a sensor can help with a number of DIY … Continue reading

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CC273: Necessity and Invention

Lacoste-Photo1-WEB

Tom Cantrell wanted to stop fiddling with his sprinklers as he tried to balance conserving water in California and keeping his lawn green. So he asked himself if he could craft a weather-savvy sprinkler controller. In the April issue of … Continue reading

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CC272: Issue of Ingenuity

Nelson Epp's rotational inverted pendulum (RIP)

The March issue of Circuit Cellar includes articles from a number of practical problem solvers, such as a homeowner who wanted to get a better grasp of his electrical usage and a professor who built a better-than-average music box. Dean … Continue reading

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CC271: Got Range?

Colin O'Flynn's Binary Explorer Board

As with wireless connectivity, when it comes to your engineering skills, range matters. The more you know about a variety of applicable topics, the more you’ll profit in your professional and personal engineering-related endeavors. Thus, it makes sense to educate … Continue reading

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CC269: Break Through Designer’s Block

A heatsink epoxied atop the linear regulator on this Arduino MEGA board helped reduce the operating temperature to a comfortable level. This is certainly not recommended engineering practice, but it’s an acceptable hack. (Source: E. Nisley, CC269)

Are you experiencing designer’s block? Having a hard time starting a new project? You aren’t alone. After more than 11 months of designing and programming (which invariably involved numerous successes and failures), many engineers are simply spent. But don’t worry. … Continue reading

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CC268: The History of Embedded Tech

axleson-usb-268

At the end of September 2012, an enthusiastic crew of electrical engineers and journalists (and significant others) traveled to Portsmouth, NH, from locations as far apart as San Luis Obispo, CA,  and Paris, France, to celebrate Circuit Cellar’s 25th anniversary. … Continue reading

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CC267: Continuity of Embedded Tech Content

A fan under the black CPU heatsink keeps it near ambient temperature, so that the Peltier module under the aluminum block can control the MOSFET temperature. The gray epoxy block holds a linearized thermistor circuit connected to the Arduino microcontroller under the PCB. (Source: E. Nisley)

The October issue features articles on topics ranging from FAT cache to IIR digital filters to a quadcopter that uses a mechanical gyro. Let’s review. On page 16, Stuart Oliver details how to use math routines that include the dsPIC … Continue reading

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CC266: Microcontroller-Based Data Management

Mark Csele's complete portable accelerometer design, which he presented in Circuit Cellar 266.  with the serial download adapter. The adapter is installed only when downloading data to a PC and mates with an eight pin connector on the PCB. The rear of the unit features three powerful
rare-earth magnets that enable it to be attached to a vehicle.

Regardless of your area of embedded design or programming expertise, you have one thing in common with every electronics designer, programmer, and engineering student across the globe: almost everything you do relates to data. Each workday, you busy yourself with … Continue reading

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Issue 265: Embedded Systems Abound

The MOSFET tester PCB hides the Arduino that runs the control program and communicates through the USB cable on the left edge. (Source: E. Nisley, CC265)

I recently read on CNN.com the transcript of an interview (May 9, 2002) with arachnologist Norman Platnick who stated: “You’re probably within seven or eight feet of spider no matter where you are. The only place on earth that has … Continue reading

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CC264: Plan, Construct, and Secure

John Breitenbach's DIY leak-monitoring system

Circuit Cellar July 2012 features innovative ideas for embedded design projects, handy design tips with real-world examples, and essential information on embedded design planning and security. A particularly interesting topic covered in this issue is the microcontroller-based home control systems … Continue reading

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Issue 263: H2M & M2M Communication

A simple single-diode unbalanced mixer and its simulation done with Labcenter's Proteus. The RF and LO frequencies are 340 MHz and 300 MHz respectively. You can see on the output spectrum that these two frequencies are still visible, but as well as the difference 40 MHz and sum 640 MHz, among others. (Source: R. Lacoste, CC263)

Before I introduce this issue, I’d like to bring your attention to our recently redesigned website, CircuitCellar.com. It enables engineers and programmers around the world to communicate and share ideas via project articles, videos, and social media. The site’s features … Continue reading

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Issue 262: Advances in Measurement & Sensor Tech

The portable touch-sensor assembly. The touch-sensor boards are mounted on the back of a digital radio, connected to a IOIO board and a Nexus One smartphone. The Android interface is displayed on the phone. (Source: M. Oppenheim)

As I walked the convention center floor at the 2012 Design West conference in San Jose, CA, it quickly became clear that measurement and sensor technologies are at the forefront of embedded innovation. For instance, at the Terasic Technologies booth, … Continue reading

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