16 Bit Event Counter & Displaying on LCD1

An External Pulse Counter Using 8051 and Dispalying on 16x2 LCD 

  A circuits which is used to count the external pulses And which is displaying on an 16x2 LCD display . You can simply use this project for various purpose .It is a default  project for counting Purpose.

Tutorials : - 

To use 16 Bit counter we need to configure some register in 8051 as follows 

TMOD Register is need to configure as follows

16 bit counter Setting with timer 0

TMOD=0x05; //  Giving 0x05 it configured so .

8051 has Two Timer (each has 16 bit ) i am taking here Timer 0 It has to part First 8 bit (TL)) and the second part is (TH0) .

This timer is using to store the Pulses from the external (ie it will increment up to 65535 or FFFF)

TL0 = 0; // that timer clearing 

TH0 = 0;  // that timer clearing 

 TR0 = 1 // TR0 setting to start the counting .


Done .................................


    After setting the above register as said  the resulted value (counting value ) will save periodically in TL0 and TH0 . That value displaying after converting it to decimal . for LCD Tutorials Go Here

Download Her the all Project Including Proteus file
Click Here

Read More

16 Bit Event Counter & Displaying on LCD1

An External Pulse Counter Using 8051 and Dispalying on 16x2 LCD 

  A circuits which is used to count the external pulses And which is displaying on an 16x2 LCD display . You can simply use this project for various purpose .It is a default  project for counting Purpose.

Tutorials : - 

To use 16 Bit counter we need to configure some register in 8051 as follows 

TMOD Register is need to configure as follows

16 bit counter Setting with timer 0

TMOD=0x05; //  Giving 0x05 it configured so .

8051 has Two Timer (each has 16 bit ) i am taking here Timer 0 It has to part First 8 bit (TL)) and the second part is (TH0) .

This timer is using to store the Pulses from the external (ie it will increment up to 65535 or FFFF)

TL0 = 0; // that timer clearing 

TH0 = 0;  // that timer clearing 

 TR0 = 1 // TR0 setting to start the counting .


Done .................................


    After setting the above register as said  the resulted value (counting value ) will save periodically in TL0 and TH0 . That value displaying after converting it to decimal . for LCD Tutorials Go Here

Download Her the all Project Including Proteus file
Click Here

Read More

Timer

Timer 

What is a Timer ? 

A Timer is device it sense the time interval and produce an output at a set value . example alarm Timer setting.(Timer in Wikipedia )

,What is the need of a timer in Micro controller ?

1) Some time  micro controller Code need some accurate  Delay  ( Example blinking An LED in each      accurate 1 sec. Look LED Blinking example

2)Some Time the code needs the code Repeat

3) Most of the Interfacing devices with micro-controller needs a clock (accurate interval of clocks)
   Example:   LCD module require Clock  Signal Look LCD Interfacing
               

Timer in 8051

Also a Timer actually require a clock pulse  (pling) .These pulse are given from controller  (actually it is in software based not giving ) see below picture

8051 type controller has  two Timer Timer 0 and Timer 1 (These two timer is the length of 16 bit ,0000 to  FFFF ).These Timer is named as TR0 and TR1. 

The Timer Setting/configuring  can controlling by the TMOD register 

These TMOD register Values is used to decide how the Timer Works .

Sample program

download the fullcode and Test

Read More

Timer

Timer 

What is a Timer ? 

A Timer is device it sense the time interval and produce an output at a set value . example alarm Timer setting.(Timer in Wikipedia )

,What is the need of a timer in Micro controller ?

1) Some time  micro controller Code need some accurate  Delay  ( Example blinking An LED in each      accurate 1 sec. Look LED Blinking example

2)Some Time the code needs the code Repeat

3) Most of the Interfacing devices with micro-controller needs a clock (accurate interval of clocks)
   Example:   LCD module require Clock  Signal Look LCD Interfacing
               

Timer in 8051

Also a Timer actually require a clock pulse  (pling) .These pulse are given from controller  (actually it is in software based not giving ) see below picture

8051 type controller has  two Timer Timer 0 and Timer 1 (These two timer is the length of 16 bit ,0000 to  FFFF ).These Timer is named as TR0 and TR1. 

The Timer Setting/configuring  can controlling by the TMOD register 

These TMOD register Values is used to decide how the Timer Works .

Sample program

download the fullcode and Test

Read More

Rotation Counter using 8051

Rotation Counter using 8051

 I need to make a counter for a transformer winding machine .In that the winding is made by hand . so the roation  need to be keep in mind ,that is too much difficult .So the winding shaft rotaion counting by an infrared sensor module which is connected with 89S52 microcontroler and a LCD .

Infrared based Rotation Counter by 805 or  (contact less Rotation Counter  or Rotation counter without using Interrupt.

 

Code : 

INFRARED Module 

Download the Full Project  CODE and with Proteus  Here

Read More

Rotation Counter using 8051

Rotation Counter using 8051

 I need to make a counter for a transformer winding machine .In that the winding is made by hand . so the roation  need to be keep in mind ,that is too much difficult .So the winding shaft rotaion counting by an infrared sensor module which is connected with 89S52 microcontroler and a LCD .

Infrared based Rotation Counter by 805 or  (contact less Rotation Counter  or Rotation counter without using Interrupt.

 

Code : 

INFRARED Module 

Download the Full Project  CODE and with Proteus  Here

Read More

Switch Bounce Tutorials

Switch Bounce

Microcontrolers may not in Human thinking frequency .Human thinking frequency is lies in some of low Hz .  Microcontroler works variety range of frequency ie ,12Mhz,20 Mhz etc .  In a push Button  micro controller interfacing, Human and Micro controller are feels that whether the push is pressed or not  in different way as follows in the graph .

Some small duration pulse due to denounce generated as multiple touch error
Hardware solution

It can be made by a resistor and a capacitor in the following manner or any other for comfortable

When ever the switch is pressed the capacitor will charge  rapidly ,practically the first charge wil be across  the  ,capacitor ,

So we can avoid the denouncing effect .

The capacitor and the resistor will be select in accordance with time constant . as follows

For more information go here

Will be update 

Read More

Switch Bounce Tutorials

Switch Bounce

Microcontrolers may not in Human thinking frequency .Human thinking frequency is lies in some of low Hz .  Microcontroler works variety range of frequency ie ,12Mhz,20 Mhz etc .  In a push Button  micro controller interfacing, Human and Micro controller are feels that whether the push is pressed or not  in different way as follows in the graph .

Some small duration pulse due to denounce generated as multiple touch error
Hardware solution

It can be made by a resistor and a capacitor in the following manner or any other for comfortable

When ever the switch is pressed the capacitor will charge  rapidly ,practically the first charge wil be across  the  ,capacitor ,

So we can avoid the denouncing effect .

The capacitor and the resistor will be select in accordance with time constant . as follows

For more information go here

Will be update 

Read More