Circuit Cellar Ink 202
May 2007

Table of Contents


CJ Abate

HTML Task Manager

Maximum Exposure


John Gorsky

New Product News

  • DS28EA00 1-Wire digital temperature sensor from Maxim Integrated Products,Inc.
  • HS-20USB four-axis step motor controller from CyberPak Company,Inc.
  • ZX-1281 64-pin TQFP microcontroller from Elba Corp.
  • AS1110 16-channel constant-current LED driver from austriamicrosystems, Inc.
  • LTC2351-14 1.5-Msps low-power ADC from Linear Technology Corp.
  • CORTEX-M3-based Stellaris microcontrollers from Luminary Micro,Inc.
  • MCP3909 energy measurement IC from Microchip Technology,Inc.


James Koehler

Proton Precession Magnetometer

Instead of purchasing an expensive precession magnetometer, you can easily build a basic system for a fraction of the cost using a Keil MCB2130 board and an NXP LPC2138 microcontroller. James explains how.



Curt Carpenter

Circuit Board Plotting

Circuit Board Plotting 101. Curt describes how to draw PCB traces onto copper-clad with a Hewlett-Packard 7440A ColorPro pen plotter and a Sharpie Ultra Fine Point permanent marker.



Brian Millier

Temperature Calibration System

Brian designed a portable temperature meter that contains a PID controller and a user interface for entering a setpoint.The meter can be plugged into a separate calibrator unit, which generates stable temperatures for sensor calibration purposes.



Lane Hauck

Embedded USB Host

You don't need an overpowered computer to communicate with just one USB device. With a little bit of code and the right host controllers, Lane designed his own embedded USB system.


Alberto Ricci Bitti

The Witness Camera

Build a Self-Recording Surveillance Camera

If burglars try to break into Alberto's house, all of their movements will be recorded by his self-recording camera system. This is no ordinary alarm detector.The well-designed system silently starts recording when it senses movement.



Ronaldo Duarte

Energy and Load Analyzer

Ronaldo's cost-effective, M16C/62P-based data logger can measure RMS voltage, current, power, harmonics, and frequency. The handy system is perfect for analyzing electrical values over time.


Lessons from the Trenches


George Martin

More "Hello World"

C Program Flow

George recently introduced you to the C programming language. He also showed you how to build a project using IAR Systems's Embedded Workbench. This month he takes a few steps back to explain the C program flow in more detail.

From the Bench

Jeff Bachiochi

What's the Slope?

Use an Accelerometer to Measure Slope

With the help of Analog Devices's ADXL103 MEMS accelerometer, Jeff can measure the slope of an object by calculating its relationship to horizontal. Read on to learn how.


Silicon Update


Tom Cantrell

Be All You Can Bee

The arrival of Microchip's IEEE 802.15.4-compatible MRF24J40 radio chip encouraged Tom to examine the state of wireless protocols. In this article, he covers the ZigBee embedded wireless initiative and Microchip's MiWi.


Crossword Puzzle


Advertiser's Index / June Preview


Steve Ciarcia

HTML Priority Interrupt

Keeping the Lights On

FTP Directory for INK 202
Follow this link to order a copy of INK 202

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