Circuit Cellar Ink 236
March 2010

Table of Contents

4 CJ Abate	HTML Task Manager Need-to-Know Info
8 John Gorsky	HTML New Product News
13 David Tweed	HTML Test Your EQ
14 Guido Ottaviani	A Sensor System for Robotics Applications If you're developing an interactive robotics platform, you'll have to incorporate a well-designed sensor system at some point. This article covers how to add "senses" to a robotics design, from sight to hearing to touch and more. Download: Ottaviani-236.zip
24 Brian Millier	RFID-Based Liquid Control Part 2: Monitoring System Implementation This article series details how to build an RFID-based controller for monitoring dispensed liquid nitrogen from a tank in a laboratory setting. Here you learn about the circuitry, command structure, and system operation. Download: Millier-236.zip
30 Peter Montgomery	Serial Network Hub Part 1: Network Topology and Design Planning If you're building a custom multipart animatronics or robotics system, consider adding a serial network hub to run the show. Here you learn why building a six-port RS-485 hub for a custom network packet system can simplify node wiring and more. Download: Montgomery-236.zip
38 Marco Aiello	Design and Program a "Minirobot" Control capability is at the heart of most robotics applications, particularly when object avoidance is a project requirement. This article details how to build a mobile "minirobot" and implement an autonomous navigation system. Download: Aiello-236.zip
46 Larry Cicchinelli	Calibrated Decibel Meter Design You can build your own calibrated decibel meter with a little know-how and four main parts: an audio amplifier, a meter circuit, a display, and a power supply. With this design, you can accurately measure the output level of most audio systems. Download: Cicchinelli-236.zip
From the Bench 54 Jeff Bachiochi	Sun Tracker Part 2: Power Up and Start Tracking The first part of this series detailed a custom time-keeping design called a "sun tracker." Now it's time to power up the tracker, start keeping time, and display the data on an LCD.
Lessons from the Trenches 62 George Martin	Put C Language to the Test Part 1: A Sudoku Puzzle-Solving Program You have a handle on C language. Now it's time to write a complete program from start to finish. How about a program for solving a Sudoku puzzle? Read on to learn how it's done. Download: Martin-236.zip
Silicon Update 68 Tom Cantrell	Tales from the Crypto A Look at Embedded Design Security The bad guys are out to steal your design, your code, your tools, your customers, and anything else that isn't nailed down. Forget about trust, every designer needs to pay more attention to verification. Fortunately, you can use some silicon to help you keep your secrets safe.
74	Crossword Puzzle
79	Advertiser's Index / April Preview
80 Steve Ciarcia	HTML Priority Interrupt A Matter of History
Bonus Article 85 Titus Gabriel Petrut	The Arduino-Based "MiniEric" Robot The "MiniEric" is a general-purpose robot used for experimentation. It includes an Arduino board and several microcontrollers for the smaller modules. You can build a similar robot to experiment with at your workbench. Download: seriousrobotics.wordpress.com

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