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89c51 Frequency Counter

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12 Threads found on edaboard.com: 89c51 Frequency Counter
sir can we make device for measuring 2ghz using 89c51
I think that, the best way to measure freq using AT89c51 is to use prescaler before feeding you pulse to MCU pins. For ex. if frequency range is 1kHz to 40Mhz, you can devide it for 1000, so your range is only 1Hz to 40Khz. It's easy to measure this range using 89c51 (Of course, your prescaler block is not simple). The last thing to do (...)
hello,i m working on a project of measuring online freq using 89c51.Can u help in making the project repotr.plzz
Hello saurav 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
hi all 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!!
Some body knows how to make a 89c51 MCU to divide the frequency TheSniper (+)
Hi , 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... thanks
hello i want to know how to measure frequency using 89c51. my frequecy range is almost 6 khz to 7khz. i need some help regarding code. thanks very much
dear friends, i am counting pulses for 89c51 and need to display the results on lcd. doing this with keil and with "c". i need to run a timer for 10 seconds and count the number of pulses for tht duraton.. coming from external interrupt EX1. ( PIN P3.2) The problem is: i cant understnd how to do tht with the timer.. to wit for 10
hey can some one give me some hints how to detect rf signals to display frequency on lcd.
There are hundreds of post on similar subject .. Just use SEARCH with "8051 AND rs232" or "89c51 AND rs232" .. Here is an example: Regards, IanP
Hi, I am learning the 89c51 programming in keil C. Presently i want to read the clock (or pulse train of any frequency form 1 to 1100 Hz using proteus software). But there is some percentage error in the values that are displayed on LCD. e.g if feed 1kHz clock signal thr LCD shows 1001 or 1002, which is not a problem. The problems comes when i mult