Fred Eady has more than 20 years of experience as a systems engineer. He has worked with computers and communication systems large and small, simple and complex. His forte is embedded-systems design and communications. Fred may be reached at fred@edtp.com.

PROJECT FILES

To download the code and pinout diagram, go to ftp.circuitcellar.com /pub/Circuit_Cellar/2003/156/.

SOURCES

 ATmega16 AVR
Atmel Corp.
(408) 436-4314
www.atmel.com

 3PXCC4A RS-232/485 Card
B&B Electronics Manufacturing Co.
(815) 433-5100
www.bb-elec.com

AVR C compiler
ImageCraft Creations, Inc.
(650) 493-9326
www.imagecraft.com

SP233ACP Converter IC
Sipex Corp.
www.sipex.com

Coyote
Z-World
(530) 757-3737
www.zworld.com