►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

Thu Jan 29 2015, 11:24 AM
durai
I found discussion relevant to my problem (link:http://www.8051projects.net/t59199/gsm-cdma-discussion/flashing-new-firmware-in-sim900-modem.htm) but i could not find the project mentioned in that discusion
Thu Jan 29 2015, 11:21 AM
durai
Hi i am using a SIM/900A GSM modem, I want to send email with an attachement using a microcontroller but when i try to use AT_Email commands it gives me error,I think modem doesnot support those commands,is there any other way to send mail using that modem??
ajay_bhargav
Thu Jan 29 2015, 06:54 AM
@gaurav, please mail me message you're trying to post.
ExperimenterUK
Thu Jan 29 2015, 01:17 AM
bhagyesh.bhavasar/gaurav.k I can post with Firefox. Can you try other browsers ?
naqirizvi
Wed Jan 28 2015, 08:08 AM
the web theme is too much buggy and heavy , admin please change it to simple theme, so that user can browse quickly
naqirizvi
Wed Jan 28 2015, 08:07 AM
some one please share software name or ebooks related to avr
bhagyesh.bhavasar
Tue Jan 27 2015, 11:06 AM
i want to share my project but there is problem occurred during postng
bhagyesh.bhavasar
Tue Jan 27 2015, 05:58 AM
@ExperimentalUK i have used that purple button but same as previous it takes me to blank page
ExperimenterUK
Sun Jan 25 2015, 08:10 PM
This box is for chat. Post problems in a suitable forum
ExperimenterUK
Sun Jan 25 2015, 08:04 PM
@gaurav.k Use the purple "Post reply" button. Green buttons often present a fresh edit box.

Downloads

Comments

sachinmm
Thu Jan 29 2015, 07:09 AM
nawfel
Sat Jan 17 2015, 07:27 AM
Rohi123
Sat Jan 10 2015, 11:00 AM
safakarici
Fri Jan 09 2015, 08:55 PM
Nikita_Pinjare
Thu Jan 08 2015, 03:10 PM
mayank058
Wed Jan 07 2015, 05:43 AM
Overeating
Tue Jan 06 2015, 05:56 AM
trancebreaker11
Sun Jan 04 2015, 07:42 AM

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Forum Activity
sankalp_s Avatar
Posted By sankalp_s
Fri Jan 30 2015, 05:40 PM
you need to remove jump statements from main progr...
mayank058 Avatar
Posted By mayank058
Fri Jan 30 2015, 07:02 AM
dear sir, please tell me how to do t...
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Jan 29 2015, 10:41 PM
T he P89V51RD2 P1.5, P1.6, P1.7 has extra curren...
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Jan 29 2015, 06:45 PM
@naqirizviAs you already have a thread running I t...
naqirizvi Avatar
Posted By naqirizvi
Thu Jan 29 2015, 02:11 PM
Circuit diagram i am following i am not sure is it...
naqirizvi Avatar
Posted By naqirizvi
Thu Jan 29 2015, 02:11 PM
Circuit diagram i am following i am not sure is it...
naqirizvi Avatar
Posted By naqirizvi
Thu Jan 29 2015, 02:11 PM
Circuit diagram i am following i am not sure is it...
naqirizvi Avatar
Posted By naqirizvi
Thu Jan 29 2015, 01:50 PM
Hi,I am new to programming got some issues in RFID...
sachinmm Avatar
Posted By sachinmm
Thu Jan 29 2015, 07:21 AM
hello sir, plz tell me the circuit diagram interfa...
ajay_bhargav Avatar
Posted By ajay_bhargav
Thu Jan 29 2015, 06:28 AM
Moreover I see the segment Anode is connected via ...