June
2005, Issue 179
Precision
Frequency Meter
Cypress
PSoC High Integration Challenge 2004 Contest Winner
You
can accurately measure frequencies up to 250 kHz with
Clayton’s CY8C27443 microcontroller-based Precision
Frequency Meter. The meter also serves as a clock.
by
Clayton Gumbrell
There
may be no such thing as a free lunch, but there is such
a thing as a free time standard! It’s in the form of
the time pips transmitted hourly via broadcast radio.
I use time pips to calibrate a frequency reference for
my Precision Frequency Meter (see Photo 1). The meter
is also an accurate clock that’s synchronized to the
national standard.
|
(Click
here to enlarge)
|
Photo
1—The faces next to the time and oven temperature
indicate their status. Although the time isn’t synchronized
to the time pips (sad face), the oven temperature
is in range (happy face). |
