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

__

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

__

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

__

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

__

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

__

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

__

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

__

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

__

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

__

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

__

Issue 261: Cap-Touch Amp Design, RL78 Intro, Embedded Linux, & More

One of Dave Jones's old projects from the '80s. It's a Veroboard construction with items from his junk bin (Source: D. Jones, CC261)

The April issue is now available. As usual, it comprises a wide variety of content: a capacitive-touch amplifier design, an intro to using the Renesas RL78 for low-power apps, info on sigma-delta modulators, Linux software development tools, mesh networking tips, … Continue reading

__

Issue 260: Creativity in Design

Balancing robot design (Source: Hanno Sander CC260)

The seed for the interview with Hanno Sander on page 16 (Circuit Cellar March 2012) was sown at the 2008 Embedded Systems Conference in San Jose, CA. Hanno was at the Parallax booth demonstrating his “Dancebot,” which is a Propeller-based, … Continue reading

__