►Keypad Connections with AVR Microcontroller

[lightbox=keypad-avr.gif|Keypad connections with AVR Microcontroller|Keypad Interfacing]
[/lightbox]
Please click on the image to enlarge it

Circuit shown above is for demonstration and does not include any reset and crystal circuit. For practical use you need to have a reset circuit and crystal.


►Keypad Connections with 8051 Microcontroller

[lightbox=keypad-8051.gif|Keypad connections with 8051 Microcontroller|Keypad Interfacing]
[/lightbox]
Please click on the image to enlarge it

Circuit shown above is for demonstration and does not include any reset and crystal circuit. For practical use you need to have a reset circuit and crystal.

◄ Introduction  |  8051 Program ►

Conversation

hiast
Thu Jun 16 2016, 03:03 PM
help please how do i initiate port 3 as an input port in assembly? acutely there is push switch connecting to p3.2 push switch connecting to p3. 3 push switch connecting to p3.4 push switch connecting to p3.5 and i need to call function when the user pressed the push switch for the previous pins (not used as counter and not as timer… just call a function ( do special thing) when any push switch is pressed ???????
Mon Jun 06 2016, 12:02 PM
nida hussain
hi.. i need some help with keypad interfacing code.like i want to write a code in c language that takes an input of 2 digit numbers from a keypad interfaced with 8051 mc and stores the entered values in some array
Sat May 28 2016, 04:34 PM
kibrom berhe
c code for locker security system based on rfid and gsm
ExperimenterUK
Wed May 25 2016, 05:05 AM
@ Ramanjaneyulu, post in forum,explain your problem
Mon May 23 2016, 11:34 PM
Ramanjaneyulu
Hi, I Am using at89c4051 for my application, I want 5u sec dely.. Up to 1milli sec iam able to producing delay. Beyond the 1milli second, I am unable to produce the acceurate dely. Plz any one help me
Sat May 21 2016, 09:51 PM
A K
i want to mak an auto dialer using gsm and atmega 16. please helpe me how to write a code to auto dial a number saved in sim
Sat May 21 2016, 10:42 AM
Alec
Hi im trying to program my 89s51 with a usbasp so any ideas on the circuit?
Wed May 18 2016, 10:08 AM
Tashu joshi
anyone know how to develop
Wed May 18 2016, 10:07 AM
Tashu joshi
i'm working for resporatry system using 8051,
Wed May 18 2016, 10:06 AM
Tashu joshi
i'm developing a respiratory system using Arduino

Downloads

Comments

Bonolai
Fri Jun 24 2016, 06:02 AM
hiast
Sat Jun 11 2016, 02:30 PM
alex1311
Thu Jun 09 2016, 06:57 AM
zaft93
Sun May 15 2016, 01:52 AM
CELEBI
Thu May 12 2016, 08:28 AM
Suro1996
Wed May 11 2016, 06:07 PM
yigithan
Sat May 07 2016, 09:09 PM
jaque
Fri May 06 2016, 07:51 PM

Online

Guests: 39, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 05:37 AM

Members: 37768
Newest member: Bonolai
Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed Jun 22 2016, 07:54 PM
I can't see why it should work sometimes and not o...
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed Jun 22 2016, 12:58 AM
You could use T0 and T1 to trigger interrupts but ...
Karan123 Avatar
Posted By Karan123
Tue Jun 21 2016, 04:40 AM
I am not Getting you . the project is to interfac...
Karan123 Avatar
Posted By Karan123
Tue Jun 21 2016, 04:34 AM
Hello,Thanks , It Works . Master-Slave address Ma...
alex1311 Avatar
Posted By alex1311
Mon Jun 20 2016, 11:38 AM
Football is my passion and I have dreamt of becomi...
ExperimenterUK Avatar
Posted By ExperimenterUK
Fri Jun 17 2016, 11:00 PM
>But Can't modify code at Receiver End for Differe...
hiast Avatar
Posted By hiast
Fri Jun 17 2016, 03:25 PM
thanks for help,i wanted to write this code as you...
Karan123 Avatar
Posted By Karan123
Fri Jun 17 2016, 12:19 PM
I don't your applications . But below should help ...
Karan123 Avatar
Posted By Karan123
Fri Jun 17 2016, 12:07 PM
I know i have to use below code at Transmitter End...
hiast Avatar
Posted By hiast
Thu Jun 16 2016, 02:58 PM
help pleasehow do i initiate port 3 as an input po...