Circuit Cellar Ink 194
September 2006

Table of Contents


Sean Donnelly
CJ Abate

HTML Task Manager

The Tradition Continues


John Gorsky

New Product News

  • D-Series IP67-rated Inclinometer from Measurement Specialties, Inc.
  • MAX7461 video Loss-of-Sync alarm from Maxim Integrated Products, Inc.
  • ADuM125x family of bidirectional I2C isolators from Analog Devices, Inc.
  • Twin thermistor sensors from EPCOS, Inc.
  • MCBSTR9 ARM9 evaluation board from Keil
  • RTG005 USB-connected FPGA and imaging system from Hunt Engineering
  • ATmega120-based Product Development Kits from JEM Innovation, Inc.
  • SBC-GX533 Linux-based Geode Development Kit from Arcom


Victor Kremin
Serhiy Matviyenko

Pulse-SensingOptical Mouse

Victor and Serhiy's USB optical mouse enables you to measure your pulse rate while you work at your PC. You can design a similar system for numerous other sensory applications.



Dennis Seguine

Simplified FSK Signal Detection

Dennis describes an efficient method for detecting FSK signals using a correlator and analog signal processing in a PSoC. The method is readily applicable to caller ID technology. When combined with a UART, it forms the core of a Bell 202 half-duplex modem.


James Gaston
Peter Hiscocks

Programmable Network Analyzer

James and Peter used an oscilloscope and a waveform generator to create a programmable network analyzer. The simple system will be a great addition to your workbench.



Carl Smith

Multifunctional Wireless Alarm

Carl's multifunctional wireless alarm system can monitor everything from the doors to the sump pump in your house. The system features an MC13192 SARD board and several wireless sensors. When the alarm is activated, simply place a call to your house to obtain a status report.



Jan Szymanski

Digital Audio Player

Jan's media player is an embedded hardware/software system for 16-bit digital audio. The simple system is built around an LPC2148 microcontroller, an SD card interface, and an audio DAC interface.


Applied PCs


Fred Eady

Go Wireless with the XBee

It's time to get rid of the wires between your sensors, slave devices, and the microcontrollers they serve. Fred shows you how to move data wirelessly with MaxStream's XBee modules. Uncomplicated wireless technology is at your fingertips. It doesn't get any better than this.



Praveen P. Deshpande

Scheduler Template for Microcontrollers

Praveen describes the process of writing a scheduler template for a single-chip microcontroller. Although he used this technique when he designed a real-time digital wall clock, you can apply it to your next single-chip microcontroller-based project.


From the Bench


Jeff Bachiochi

SPI Power Alarm

Power loss? No problem. Jeff's PIC16F87-based SPI power alarm peripheral circuit will keep you on top of things. This simple design will be a useful addition to a variety of applications, particularly those in the healthcare industry.


Silicon Update


Tom Cantrell

ARMed and Dangerous

A lot has changed since Tom started covering ARM microcontrollers back in 2003. This month he brings you up to speed on the new parts and players in the ARM MCU world.


Crossword Puzzle


Advertiser's Index / October Preview


Steve Ciarcia

HTML Priority Interrupt

My Kingdom for a Petabyte

FTP Directory for INK 194
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