Parallel Telephone with auto secrecy (AT89C2051) : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes

Quick Links

Online

Guests: 38, Members: 5 ...

duncan viewing forum.php

luckynumber viewing forum.php

$bond$ viewing request.php

Dien Tran viewing news.php

Ajay viewing news.php

most ever online: 164
(Members: 3, Guests: 161) on 07 Aug : 09:07

Members: 10374
Newest member: $bond$

8051 Projects [ projects based on 8051 ]

Parallel Telephone with auto secrecy (AT89C2051)

Author

Binu J

Author email

binu_ji@yahoo.com

Author website

www.binu.somee.com

Bookmark this download

Description

This Project can be used in houses and offices in which more than one telephone is connected in parallel through a single telephone line Our project is used to connect a maximum of four telephones in parallel. When any one of the phone is lifted, all the other lines are disconnected from the telephone line. The above condition is also applicable when the telephone ring arrives only one telephone which is connected to the telephone line which is lifted first, while the other three lines are disconnected from the telephone line. All the functions are controlled by the 8 bit Microcontroller AT89C2051 which has a ROM of 2 Kilobytes.

Image

Filesize

70.39 kb

Date

Wednesday 04 July 2007 - 02:57:24

Downloads

4446

Download

Rating

7.2 - 4 votes

<< Previous [Microcontroller Based Caller ID (AT89C2051)]

Back to list

[PC BASED DATA LOGGER (AT89S52 + VB)] Next >>

Comments

tienduhieu | 22 Sep : 20:16

thanks
Reply to this

p.parthi_1990@yahoo.com | 12 Dec : 04:48

i want to application,advantage,dis advantage,working principal
of parallel telephone with auto secrecy
Reply to this

p.parthi_1990@yahoo.com | 12 Dec : 05:14

i have construction, advantage,disadvantage,application

Reply to this

Ajay | 12 Dec : 10:16

USE FORUM....
WE DO NOT SEND SPECIAL MAILS.. WHO SO EVER HAS A DOUBT USE FORUM!

Reply to this

N.SUNDAR | 18 Jan : 02:35

I WANT TO CKT AND APPLICATIONS AND PCB LAYOUT,PROGRAMS
Reply to this

suray | 22 Jan : 03:01

hello sir/mam
i like ur project. im from sikkim n i woulk like to know the operation and dircuit discreption of the project
can u plz sen me

Reply to this

gangadhar | 27 Mar : 04:25

i need program for this project
Reply to this

jks_029@yahoo.com | 30 Mar : 01:10

i need the operation of parallel telephone with auto secrecy.........and circuit discription..............can u plz snd me
Reply to this

jks_029@yahoo.com | 31 Mar : 04:11

i need the operation of relay in parallel telephone with auto secrecy..can u plz snd me.
Reply to this

reach_aqua@yahoo.co.in | 27 Jun : 06:20

i want to application,advantage,dis advantage,working principal
of parallel telephone with auto secrecy.
thx

Reply to this

Submit comment