### Frequency Counter using AT89C2051 and LCD (Assembly)

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 cycles per second. I made use of this logic to calc... Read Compelte post
Posted on Tue Oct 27 2009, 05:27 PM

### Frequency Counter using AT89C2051 and LCD (Assembly)

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

Tue May 19 2020, 06:29 PM
Does anyone have microcontroller programming software for STC15F104W (core 8051, 4 k, 128 byte, 6 I/O pin, UART ... DIL8), that works?
Sat May 02 2020, 03:38 PM
Tamu Gurung
Hi I am looking for a assembly language program for a digital decimal counter. Time counts max limit of 2 mins starting from 2.00 mins and ending at 0.00. time is to be displayed on 4 7-segment LED displays. Edsim51 simulator to be used. Thanks
Wed Mar 25 2020, 09:39 AM
Tajammul
Sir kindly send the code file i2c for 8051
Fri Mar 13 2020, 06:36 PM
@ Rohitnani,ABEBE..which project ?
Fri Mar 13 2020, 08:55 AM
ABEBE
how can get hadwere of this project
Sat Mar 07 2020, 12:11 PM
Wed Feb 26 2020, 11:58 AM
Peter Parker
Is it possible to send multiple messages using only 1 GSM module?
Sat Feb 01 2020, 05:12 AM
Pearl Olin
Hello,
Wed Jan 22 2020, 01:16 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, 02:08 AM
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

### Recent

Davidthils
Thu May 21 2020, 08:44 AM
Jakeror
Wed May 20 2020, 09:28 PM
motorCar
Wed May 20 2020, 03:05 PM
Vordrync
Wed May 20 2020, 07:52 AM
Wed May 20 2020, 03:15 AM
scena
Tue May 19 2020, 06:08 PM
CodySiz
Tue May 19 2020, 02:22 PM
ClaireSat
Mon May 18 2020, 09:50 PM

#### Online

Guests: 103, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 01:37 AM

Members: 38211
Forum Activity
##### Posted By xrxx
Thu Apr 30 2020, 06:59 AM
BCD MULTIPLICATIONAssume that you have to 2 BCD nu...
##### Posted By liqian
Tue Apr 28 2020, 05:26 AM
I happened to see your post and I got many useful ...
##### Posted By ExperimenterUK
Tue Apr 28 2020, 04:21 AM
Sun Apr 26 2020, 01:53 AM
##### Posted By ExperimenterUK
Sat Apr 25 2020, 05:42 PM
Some simulators handle displays better than others...
Sat Apr 25 2020, 03:59 PM
Hello everyone, sorry in advance if i'm not in the...
##### Posted By PHANTOM28
Fri Feb 28 2020, 10:25 AM
Hi.I hope you all can help me. I am relatively ne...
##### Posted By ExperimenterUK
Fri Feb 21 2020, 05:05 PM
Did you sort out your problem?
##### Posted By ajay_bhargav
Fri Feb 21 2020, 04:45 AM
Yes you can do that.1. Create a channel @Thingspea...
##### Posted By ananyagupta
Thu Feb 20 2020, 03:58 AM
With regards to the particular characters sent to ...