project help

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
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Posted by isha on Wed Jul 11 2007, 01:29 PM

project help

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 ... Read Compelte post
Posted by ajay_bhargav on Wed Jul 11 2007, 01:46 PM

automatic room light controller with visitor counter

the transistors are used to drive the common cathode of each 7 segment display,

the displays here are used with multiplexing technique means there is only one display works at a time but it shifts so fast therefor all display works simultaneously

the two LDR's here use for input as active low. means initially it is in high state (1)and it get input by grounding the pins (or 0)
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Posted by Ritesh on Sat Jul 14 2007, 08:39 AM

automatic room light controller with visitor counter

plz tell me that which microcontroller is used in the project "automatic room light controller with visitor counter" ?? In the description of the project 89c2051 is mentioned but in the circuit diagram 89S52 is used???????
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Posted by isha on Fri Jul 13 2007, 09:01 AM

10 New 8051 Projects

For all those students and hobbyists who are looking for microcontroller 8051 projects in assembly language. Ten latest projects based on 8051 are available for download. Here is the list of projects available.

1. Auto Control of three phase Induction motor (AT89C2051)

2. Automatic College Bell (AT89S8252 & DS1307)

3. Automatic plant Irrigation (AT89C2051)

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Posted on Wed Jun 06 2007, 01:45 PM

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

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dyoussef
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hiast
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ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Jun 30 2016, 05:44 AM
I think the display/ editor software added the a...
dyoussef Avatar
Posted By dyoussef
Wed Jun 29 2016, 07:34 PM
Hello, I am referencing this project: http://www.8051projects.net/wiki/I2C_Implementation_on_PICI am using PIC16F1847 and XC8 so I've had to make a few changes to the code. While making changes, my compiler gave me an error for the I2CWait function for the while statement. It says "unexpected token amp". Here is the line in question:while ((SSPCON2 & 0x1F ) || ( SSPSTAT & 0x04 ) );I changed the register names to be consistent with my PIC but it didn't solve the problem.What changes do I need to make to this function so that this error does not occur?
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed Jun 22 2016, 07:54 PM
I can't see why it should work sometimes and not o...
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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...
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Posted By Karan123
Tue Jun 21 2016, 04:34 AM
Hello,Thanks , It Works . Master-Slave address Ma...
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Mon Jun 20 2016, 11:38 AM
Football is my passion and I have dreamt of becomi...
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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...
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Posted By Karan123
Fri Jun 17 2016, 12:19 PM
I don't your applications . But below should help ...