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

Tue Feb 09 2016, 11:02 PM
Ankush SS
Can i get the source code of this project? Please n thnk u for ur kindness
Fri Feb 05 2016, 02:18 PM
SANJYOT JADHAV
sir did we have to use Gsm modem for testing the circuit on proteus
Tue Feb 02 2016, 05:02 PM
upendra kumar
i want information about 3-phase motor control using gsm technology
Sat Jan 16 2016, 11:18 PM
Kenneth Etuk
Hi everyone, I need help with a project involving MCU,rttc, and DC motor. I will pay for it. please reply to my mail [email protected] if you are interested. thanks
ExperimenterUK
Sat Jan 16 2016, 07:53 AM
@Kabona Log in and create a thread. Tell us what you want to do
Wed Jan 13 2016, 02:09 AM
Kabona
how can I make my pc be input and output device for the microcontroller
Sat Jan 09 2016, 12:49 PM
Ravz
Thank u..... one more doubt Will ultrasonic sensor HC-SR04 works with aurdino board in operating system linux
Tommy.Kofisterix
Sat Jan 09 2016, 02:35 AM
I know it detects also the mud on rear bumper, this means other obstacles will
Tommy.Kofisterix
Sat Jan 09 2016, 02:33 AM
Hey hi, hello
Tue Jan 05 2016, 08:48 PM
Ravz
Anybody here????

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sankalp_s Avatar
Posted By sankalp_s
Thu Feb 11 2016, 06:28 PM
Hello phil sir finaly i'm dumping my code, now i'm...
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Posted By ExperimenterUK
Thu Feb 04 2016, 04:10 AM
Sir I didn't understand that. Could you explain ab...
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Posted By sankalp_s
Tue Feb 02 2016, 07:26 PM
but good use of sub routines will save a lot of ...
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Posted By ExperimenterUK
Tue Feb 02 2016, 12:25 AM
after removing ALLON instruction it's working fine...
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Posted By ExperimenterUK
Tue Feb 02 2016, 12:14 AM
Which micro controller are you using ?.Does it hav...
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Posted By sankalp_s
Sat Jan 30 2016, 07:40 PM
You need to explain exactly what you want the code...
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Posted By ExperimenterUK
Sat Jan 30 2016, 06:57 PM
>sir can you code this in any other method?You nee...
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Posted By sankalp_s
Sat Jan 30 2016, 06:47 PM
CALL ALLONCLR L1CLR L2CLR L3CLR L4CALL DELAY ;del...
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Sat Jan 30 2016, 10:03 AM
I have used to timer 2 external pin for other purp...
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Hello,I am building the dotmatrix display, where I...