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OF YOUR ELECTRIC POWER GRID
Precision PC-Based 60-Hz Frequency Counter
by Doug Criner
Start ý Frequency
and Time Errors ý A Struggling Grid
ý Only Three Parts ý Sources
and PDF
SOURCES and PDF
Download
the PDF of this Article. 
Doug Criner is an electrical engineer
with experience in the power industry. He is a member of IEEE Power
Engineering Society and earned his BS in electrical engineering from
the University of Illinois. He may be reached at dcriner@ieee.org.
RESOURCE
Wall power supply, transformer, DE9
serial cable
Jameco
(800) 831-4242
(650) 592-8097
Fax: (800) 237-6948
Fax: (650) 592-2503
www.jameco.com
SOURCES
QuickBASIC, Excel
Microsoft Corp.
(425) 882-8080
www.microsoft.com
WTPCT-M pulse counter/timer module
Weeder Technologies
(850) 863-5723
www.weedtech.com
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