Frequency Counter using AT89C2051 and LCD (Assembly)

Project tested and working perfectly

A very simple easy to make Frequency counter project. This project is powered with small AT89C2051 microcontroller with LCD. Block Diagram of circuit is shown below. It can support a wide range of frequency input starting from 1Hz to ~16.5Mhz, rest depends on pin characteristics.

Theory of Operation
As we all know frequency of a signal is number of cycle per second. I made use of this logic to calcu... Read Compelte post
Author: Ajay Bhargav | Date added: Tue Oct 27 2009, 05:06 PM

Frequency Counter using AT89C2051 and LCD

xx yy zz are used in X2D routine which is 4 byte hex to decimal conversion routine.

XX0,XX1,XX2,XX3 is input 4 byte number, YY0,YY1,YY2,YY3 is temporary number used inside X2D routine, and lastly ZZ0,ZZ1,ZZ2,ZZ3 is the o/p BCD number of X2D routine.

TMR0_ISR is used as interrupt service routine for 1 sec timer.
TMR1_ISR is interrupt routine for counting incoming signal frequency.
disp_num to display a... Read Compelte post
Posted by ajay_bhargav on Tue Feb 02 2010, 07:23 AM

Conversation

ExperimenterUK
Fri Mar 13 2020, 10:36 PM
@ Rohitnani,ABEBE..which project ?
Fri Mar 13 2020, 12:55 PM
ABEBE
how can get hadwere of this project
Rohitnani
Sat Mar 07 2020, 05:11 PM
Sir, Could you please send me the zip file input password....
Wed Feb 26 2020, 04:58 PM
Peter Parker
Is it possible to send multiple messages using only 1 GSM module?
Sat Feb 01 2020, 10:12 AM
Pearl Olin
Hello,
Wed Jan 22 2020, 06:16 PM
MINU CHAUDHARY
I m getting errors while simulation process during interfacing socket output and lcd... Can i get the report of ur project which is same as us.
Tue Jan 14 2020, 07:08 AM
shubham kharade
when i am trying to simulate the program in Proteus 8 professional, I am getting some errors as cannot find module file dhtxx.md can u help me
Tue Dec 17 2019, 01:44 PM
Devangi
hello..i am programming industrial timer using 8051 with 24lc64 eeprom. i have query in storing the 3 diff value in eeprom with enter button. can anyone share c code ?
Tue Dec 17 2019, 10:30 AM
Andrius
Hello. Can anyone share the code in Bascon and scheme in Proteus?
Thu Nov 21 2019, 12:30 PM
raj2555
how to interface 8051 microcontroller with NRF24L01+ module

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