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September 2006, Issue 194

Multifuctional Wireless Alarm
Freescale Wireless Design Challenge 2005


by Carl Smith


StartSystem Overview Installation & Operation Garage Door Module Water Level Module Temperature Module Hardware Design Garage Door Sensor Water Level Sensor Temperature Sensor Software Design Improvements Peace of Mind Sources and PDF

SOURCES AND PDF

Download the PDF of this article.


Carl Smith (cdsmith@engineer.com) has more than 12 years of experience in electronic engineering design. He has worked on everything from high-current DC motor controllers to desktop computer components. Carl earned a B.S.E.E. in 1992 and an M.B.A. in 1994 from North Dakota State University, but has been tinkering with electronics since his age was measured in single digits.


 

PROJECT FILES

To download the code, go to ftp://ftp.circuitcellar.com/pub/Circuit_Cellar/2006/194.


 

SOURCES

AD822 Op-amp
Analog Devices, Inc.
www.analog.com

SSI204 DTMF Detection IC
BG Micro
www.bgmicro.com

CH1837 DAA
Cermetek Microelectronics, Inc.
www.cermetek.com

MPXM2010GS Pressure sensor, MC13192 EVB, MC13192 SARD, and Simple MAC software
Freescale Semiconductor, Inc.
www.freescale.com

Emic Text-to-speech module
Grand Idea Studio
www.grandideastudio.com

LT1081 RS-232 Dual driver/receiver
Linear Technology Corp.
www.linear.com

LM34 Precision Fahrenheit sensor
National Semiconductor
www.national.com

ULN2003 Darlington array
ST Microelectronics
www.st.com