Discussion in "Project Help" started by    isha    Jul 11, 2007.
Wed Jul 11 2007, 01:29 PM
#1
sir, i've a question related to the project named 'Digital Visitor Counter', that ''what type of sensors are used in this project" , complete information about these sensors..... reply me as soon as possible
Thanks
Tags Digital Visitor Countersensors for Visitor counter
Wed Jul 11 2007, 01:46 PM
#2
Thank you for posting it here.. this is going to help others too
...
so, regarding the sensors, in the project, LDRs are used. LDR = Light Dependent Resistor
There are two LDRs in the circuit, one is on the exit door and on the entrance door.
So when someone crosses the entrance door, it counts the visitor up and when someone crosses the exit door, it decrement the counter.
Timer is setup to refresh the 7-Segment display.
Hope this information is sufficient for the project. If anymore info is needed feel free to ask
 Halley like this.
Tags Digital Visitor Countersensors for Visitor counter
Sun Dec 21 2008, 11:26 AM
#3
The visitor counter isnt working, some problem in the cde.... the rxd port is not read....
Help!!!
Sun Dec 21 2008, 11:29 AM
#4
I want to shift the inputs to some other port so I can serial port it....
But the circuit code only increments and doesnt decrement....
Sun Dec 21 2008, 11:33 AM
#5
whats the exact problem? are you sure your hardware is ok?
Sun Dec 21 2008, 11:43 AM
#6
i simulated the code on software to make sure its working before i shifted to hardware, and it only increments and doesnt decrement.... sensor circuits work on software... i tried it on hardware and I cant get my sensors to work, but im going to get something of better quality...
the problem seems to be in the rxd port... its not read...


[ Edited Sun Dec 21 2008, 11:54 AM ]
Sun Dec 21 2008, 12:33 PM
#7
how did you make sensor circuit? using switches? which software are u using for simulation? send me hex + ckt if proteus.
Sun Dec 21 2008, 12:59 PM
#8
Your post is not clear.
You're saying it works ok in simulation but not in hardware?
Or it doesn't work in either?

You must remember....for incrementing,the sensor at P3.0 must be obsteucted first and then P3.1
For decrementing,P3.1 must be obstructed first and then P3.0
Fri Jul 17 2009, 01:57 AM
#9
sir in this circuit .how relay will be connected..it is of five pin..but in circuit it is not clear how to connect,..plz help
Sun Jul 19 2009, 06:20 PM
#10


sir in this circuit .how relay will be connected..it is of five pin..but in circuit it is not clear how to connect,..plz help

sharik



i saw the circuit and its all clear, your coil is connected with one pin to VCC and other to Q1 transistor.

NO(normally open) is connected to bulb and NC(normally closed) is not connected.

common pin is connected to AC supply.

what is not clear to you, please mention.

One suggestion is to open up a new thread for yourself instead of posting in a thread which is months old

Get Social

Information

Powered by e107 Forum System

Conversation

Thu Nov 21 2019, 12:30 PM
raj2555
how to interface 8051 microcontroller with NRF24L01+ module
ExperimenterUK
Sat Oct 12 2019, 10:23 PM
Log in.. then post your code in the 8051 forum
Sat Oct 12 2019, 10:18 AM
Bhadra Sajikumar
i am doing a countdown timer with 8051 for my project, unfortunately our professor had to take a leave of absence before he could teach us most of it.. can someone explain the .asm code of it for me?
Mon Sep 23 2019, 07:37 AM
Nathaniel
I am doing a project for my schools wireless security system with cameras,sensors and spot lights using 8051 micro controller, could you help me out with the design and its source code.
Wed Sep 18 2019, 08:48 PM
Caryn Kover
Thank you for your time,
ExperimenterUK
Mon Aug 05 2019, 07:09 PM
@Ismail ..post in forum, give details
Mon Aug 05 2019, 04:33 PM
Ismail balghmi
Hello. Please I won't download
ExperimenterUK
Wed Jul 24 2019, 12:47 AM
@BUSTER123 Please post in the forum
Tue Jul 23 2019, 06:13 PM
BUSTER123
hello! newbie here. i am kind of a guy who hates using ready - made existing libraries, so this helped a lot as i was trying to control and write to a character lcd display. however, i can't figure out how to set the cursor position. for example, i want to set it to the 5th column in the first row, so position 5. so according to the table, i am sending 10000101 on the 8 data lines of the lcd (register select pulled low). the cursor does not move there however. and i cant move the cursor left or right too. is it something wrong that i am doing? thank you.
ExperimenterUK
Thu Jul 11 2019, 07:55 PM
@ramos https://www.theengineeringprojects.com/2017/09/l298-motor-driver-library-proteus.html

Downloads

Comments

ananyagupta
Tue Dec 03 2019, 07:53 AM
wells
Mon Nov 25 2019, 08:25 PM
auwal
Tue Nov 19 2019, 03:13 PM
ANKITPATEL
Mon Nov 18 2019, 11:00 AM
Casmir
Wed Nov 13 2019, 06:25 AM
DeepakBGattani
Mon Nov 11 2019, 01:31 PM
Jeanbusatta
Sun Nov 10 2019, 04:42 AM
mdayaz
Sat Nov 09 2019, 03:41 PM

Online

Guests: 33, Members: 0 ...

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

Members: 38107
Newest member: ananyagupta
Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Fri Nov 29 2019, 04:24 AM
" Is it possible to interface a fingerprint scanne...
ilylily07 Avatar
Posted By ilylily07
Thu Nov 28 2019, 03:50 PM
You will not find any code for an 8051 as no one w...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Nov 26 2019, 05:44 PM
You will not find any code for an 8051 as no one w...
ilylily07 Avatar
Posted By ilylily07
Tue Nov 26 2019, 04:13 AM
I tracked down a OV7670 data sheet.The OV7670 puts...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Nov 26 2019, 12:08 AM
I tracked down a OV7670 data sheet.The OV7670 puts...
ilylily07 Avatar
Posted By ilylily07
Mon Nov 25 2019, 04:38 PM
The 8051 has too little memory to do anything us...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Nov 19 2019, 10:44 PM
The 8051 has too little memory to do anything us...
ilylily07 Avatar
Posted By ilylily07
Mon Nov 18 2019, 09:54 AM
0v7670 camera interfacing with stc 8051.using asse...
Jeanbusatta Avatar
Posted By Jeanbusatta
Sun Nov 10 2019, 04:43 AM
ty, really needed it
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Oct 22 2019, 05:18 AM