Circuit Cellar Ink 207
October 2007

Table of Contents

4


CJ Abate

HTML Task Manager

Mark Your Calendars

8


John Gorsky

New Product News

  • DAQe-2208 96-channel, 12-bit, 3-Msps, PCIe DAQ card from ADLINK Technlogly, Inc.
  • AnadigmFilter1 dpASP chipset from Anadigm, Inc.
  • SIFI-F (B84111FM*) series of two-line EMC filters from EPCOS, Inc.

10


Brian Felder

Signal Recovery

Restore the Attenuated Portion of an AC-Coupled Signal

Brian developed an algorithm for a digital filter that restores the attenuated portion of an AC-coupled signal. A digital storage oscilloscope captures the waveform and data is passed through the digital filter. The result is the original signal without the DC portion.

Download: Felder-207.zip

18


Darryl Uchitil

Wireless Thermostat System

Darryl designed a wireless zone thermostat system that can remotely read the temperature, calculate the dew point, and force a setback. This easy-to-implement design is perfect for the home or office.

Download: Uchitil-207.zip

26


Thomas Black

The Monarch Butterfly

Build a Barometric Altimeter

The Monarch is a compact, easy-to-use barometric altimeter. The ATmega169-based system is used for the barometric sensing of air pressure, digital temperature sensing, and RC servo pulse decoding.

Download: Black-207.zip

35


Aubrey Kagan

Resilience in Embedded Designs

Part 2: RS-485, Voltage Supervisors, Watchdogs, & Outputs

Last month, Aubrey described how you can protect your designs' inputs so they can endure under the worst conditions.This month, he covers RS-485, resilient outputs, and watchdogs. Keep your designs protected!

Download: Kagan-207.zip

40


Ken Merk

Simple Ethernet

You can use a picoFlash SBC with an Ethernet controller to send embedded Ethernet between master and slave nodes. The easy-to-use system makes writing software packets and debugging a cinch.

Download: Merk-207.zip

46


Nicusor Birsan
Ionut Tarsa

Embedded Speech

Speech Synthesis for Small Applications

It's time to try your hand at an embedded speech application. In this article, Nicusor and Ionut introduce you to speech synthesis technology and describe how to bring audio capabilities to small embedded applications.

Download: Birsan-207.zip

Above the Ground Plane

55


Ed Nisley

Hearing Clearly

Hardware

In his last column, Ed covered his hearing booster's design. This month he focuses on the actual circuit board and its limitations.

Download: Nisley-207.zip

From the Bench

60


Jeff Bachiochi

RoboGrowth

Jeff attended the recent RoboBusiness Conference and Expo in Boston. This month, he presents everything you need to know about this year's crop of promising robotics technologies.

The Darker Side

70


Robert Lacoste

No Fear with FIR

Put a FIR Filter to Work

Working with finite impulse response (FIR) filters isn't black magic. Robert covers the basics and touches on the mathematical concepts you'll need to understand in order to put a FIR filter to work.

Download: Lacoste-207.zip

Silicon Update

80


Tom Cantrell

I Sense, Therefore I Am

As Tom has said in the past, "Sensors are as key to embedded control applications as the controllers themselves." Read on to learn about the hot new sensor technologies that he encountered at the 2007 Sensors Expo in Chicago.

93

Crossword Puzzle

94

Advertiser's Index / November Preview

96


Steve Ciarcia

HTML Priority Interrupt

The Law of Unintended Consequences

FTP Directory for INK 207
Follow this link to order a copy of INK 207

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