Circuit Cellar Ink 280
November 2013

Table of Contents

4 Mary Wilson	HTML Editor's Letter Analog Communication and Calibration
Questions & Answers 10 Nan Price	Electrical Engineer, Entrepreneur, Author An Interview with Jeremy Blum Jeremy Blum, 23, has always been a self-proclaimed tinkerer. From Legos to 3-D printers, he has enjoyed learning about engineering both in and out of the classroom. A recent Cornell University College of Engineering graduate, Jeremy has written a book, started his own company, and traveled far to teach children about engineering and sustainable design. Jeremy, who lives in San Francisco, CA, is now working on Google's Project Glass.
16 CJ Abate	HTML New Product News 4050 Series of dual-channel function/arbitrary waveform generators from B&K Precision Corp. iW1679 digital PWM controller IC from Dialog Semiconductor ASURO small autonomous multisensored educational robot from Global Specialties A4900 high-voltage brushless DC (BLDC) MOSFET gate driver IC from Allegro MicroSystems, LLC
20 David Cass Tyler	Calibration Part 1: Linear ADCs and DACs Linear ADCs and DACs must be calibrated to achieve precision. This article explains how you can use a straight line equation to help achieve calibration. Download: 280-Tyler.zip
32 Dick Cappels	Analog Serial Communication Duplex Data and Power Over One Pair of Wires How can you design a full-duplex signaling path that is transparent to a signaling protocol? This article describes a simple and inexpensive method that combines a pair of analog cable adapters with some analog circuit techniques.
40 Graig Pearen	Solar Array Tracker Part 2: SunSeeker Software and Installation The first part of this article series introduced the SunSeeker, a solar photovoltaic (PV) system that tracks, monitors, and adjusts solar PV arrays based on weather and atmospheric conditions. This article examines the SunSeeker's equipment installation and commissioning tests. Download: 280-Pearen.zip
Green Computing 45 Ayse K. Coskun	Application-Aware Power Capping Power capping, which limits a computing system's power consumption within a given value, helps computers control energy use, electricity cost, and temperature. This article explains how to incorporate "application awareness" into power capping to improve efficiency and user experience.
The Consummate Engineer 50 George Novacek	Battery Basics Part 3: Battery Management ICs All batteries are not created equal. The ones you use should be matched to the type of equipment and its use. This article describes some battery management ICs to help make battery charger design quick and easy.
Above the Ground Plane 54 Ed Nisley	Low-Loss Hall Effect Current Sensing Replacing a current-sensing resistor with a magnetic field and a Hall effect sensor can improve efficiency. Ed takes a look at the tradeoffs, winds some toroid coils, and measures the circuits to see how they perform.
From the Bench 60 Jeff Bachiochi	Robot Simulation Part 2: Translating RobotBASIC The first part of this article series introduced the RobotBASIC (RB) IDE and the RobotBASIC Robot Operating System (RROS), which provides a direct interface with your robot's hardware. This article describes how to translate between the RROS and the iRobot Create open interface by intercepting RB serial commands using RB's opcode to create a translation function index. Download: 280-Bachiochi.zip
72	Crossword Puzzle
73 David Tweed	HTML Test Your EQ
78	Crossword Puzzle - Answers for Issue 279
80 Ying Yin	Tech the Future Natural Human-Computer Interaction

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