Circuit Cellar Ink 199
February 2007

Table of Contents


CJ Abate

HTML Task Manager

What's Your Thing?


John Gorsky

New Product News

  • WL01 Wireless LAN module from Beck IPC GmbH
  • PearlBlue Class 1 intelligent Bluetooth module from emxys
  • 9000 Sonar Ranging Module from SensComp, Inc.
  • MRF24J40 2.4-GHz IEEE 802.15.4 (ZigBee) transceiver from Microchip Technology, Inc.
  • HYDRA Propeller-powered Game Console from Parallax, Inc.
  • DSO-8502 PC-based oscilloscope from Link Instruments, Inc.
  • LTC4263 Power Sourcing Equipment (PSE) controller from Linear Technology Corp.
  • TFDU7100 IrDA transceiver from Vishay Intertechnology


John Caruana
Doug Irvine
Matthew Quenet
Chris Cheng

Modular Wireless Tracking System

Children, vehicles, and animals all have something in common: they are always on the move. With this modular wireless tracking system, you can keep tabs on the moving objects of your choice. The system features a GPS module, a digital compass, and an LCD.



Craig Ross
Ricardo Goto

RFID Security System

Craig and Ricardo designed an RFID-based proximity security system for use with identification cards. The system communicates with an administrator PC via a serial communications link and HyperTerminal.



Chris Hiszpanski

DSP-Based Vehicle Monitoring

Chris's iTrack DSP-based vehicle-monitoring system features remote cellular control.You can use your cell phone to locate your vehicle and control everything from its headlights to its door locks.



Peter Csaszar

Nixie Tube Propeller Clock

Peter built his Nixie Tube Propeller Clock (NTPC) around a Microchip PIC16F84A microcontroller. The firmware was developed in assembly language with the MPLAB development suite.



Ko Ihara
Kashif Javed

Build a Reflow Oven Controller

If you're having trouble soldering small chips, try reflow soldering. Ko and Kashif explain how to design a reflow soldering oven that won't burn a hole in your wallet.



Alex Deyneko

Wireless Firmware Updates

Alex shows you how to perform a remote firmware update. You can use this technique for virtually all of your mobile and robotics applications. Now you don't have to disassemble your devices and their physical connections to CPU boards.


Above the Ground Plane


Ed Nisley

Battery Capacity


You can't do much to improve battery design. You can, however, do your best to understand their chemistry, how they work, and how they behave under various loads. Ed focuses on the discharge portion of the battery cycle.


Applied PCs


Fred Eady

Embedded Capacitive Touch Applications

Get ready to build a capacitive touch application. Fred covers the basics and then describes useful capacitive touch sensing techniques for CapSense-enabled PSoC devices.


From the Bench


Jeff Bachiochi

Electric Movement and Control

Electric power or gas? As the debate over the use and abuse of energy resources rages on, Jeff weighs in with some useful information about electric vehicles. How do they operate, and how can you apply your engineering skills to get a working design on the road? Read on to learn how he mapped the energy consumption for an electric bicycle.

Silicon Update


Tom Cantrell

Traveling Man

Tom recently traveled to the Embedded Systems Conference in Boston and the ARM Developers' Conference in Santa Clara. This month, he introduces many of the new embedded technologies that may soon figure prominently in your designs.


Crossword Puzzle


Advertiser's Index / March Preview


Steve Ciarcia

HTML Priority Interrupt

A Home Control Event Worth Remembering

FTP Directory for INK 199
Follow this link to order a copy of INK 199

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