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7 Threads found on edaboard.com: 89c51 Frequency Counter
i m trying to get input pulse in 89c51 through external interrupt.that pulse is unknown !!
then i could i calculate the frequency of that pulse!!
Professional Hardware and Electronics Design :: 11-18-2012 01:54 :: sujeethaa :: Replies: 18 :: Views: 918
sir can we make device for measuring 2ghz using 89c51
Microcontrollers :: 02-11-2011 06:45 :: harishwww :: Replies: 2 :: Views: 1590
hey can some one give me some hints how to detect rf signals to display frequency on lcd.
Microcontrollers :: 02-23-2010 11:33 :: santoshaxl :: Replies: 8 :: Views: 1047
frequency:- No. of pulses/1sec
With help of uC 89c51 you can measure only 0-5V pulses.
Therefor is your triangular wave have amplitude with in this range? if not then
convert triangular wave to square wave. then connect this to int1/INT0,
Configure timer2 for one second using 16 bit auto reload.
Before stating measurement init
Microcontrollers :: 10-09-2006 05:34 :: BABESH :: Replies: 3 :: Views: 864
hello,i m working on a project of measuring online freq using 89c51.Can u help in making the project repotr.plzz
Embedded Systems and Real-Time OS :: 04-11-2006 02:17 :: deepti.deeps :: Replies: 1 :: Views: 1330
can be quiet simple but still i want to ask what's the maximum frequency i can measure with 89c51 running on 24MHz crystal. i want to design a frequency meter using these basic two components...
Microcontrollers :: 10-06-2005 22:43 :: sush :: Replies: 1 :: Views: 596
Some body knows how to make a 89c51 MCU
to divide the frequency
Microcontrollers :: 03-06-2005 12:04 :: TheSniper :: Replies: 5 :: Views: 1047