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
... Read Compelte post
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

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gigyani
Thu Apr 18 2019, 02:10 AM
please send me the code for the control unit of Electroni voting machine.
Thu Apr 18 2019, 01:06 AM
asianwomenmut
writing
ExperimenterUK
Sun Apr 14 2019, 10:52 PM
@hassan malik post your problem in the "General help Guidance and Discussion" forum
Sun Apr 14 2019, 05:06 PM
RAJESH MAPARi
please send me code to interface atmega32 with 24c1024 serial eeprom
Sun Apr 14 2019, 01:33 PM
hassan malik
hello sir i installed proteus 7.8 professional on window 7 ultimate and window 10 but there would be same errors onn both windows. the error is bad license key.please any one help me
Sun Apr 14 2019, 01:32 PM
hassan malik
hello sir i installed proteus 7.8 professional on window 7 ultimate and window 10 but there would be same errors onn both windows. the error is bad license key.
ExperimenterUK
Sat Apr 06 2019, 05:59 PM
@deshrar. Please post your question in 8051 forum
Sat Apr 06 2019, 07:43 AM
deshraj
hallo mam.. i have downloded gsm notice board code its running fine on lcd but how so send msg to the module . i mean format of password and msg.. thank you
kevinharsha
Wed Apr 03 2019, 04:38 PM
Can i see the circuit diagram for the music tone library 8051 project?
ExperimenterUK
Wed Apr 03 2019, 02:45 AM
@Prudhvi. Please post your request in 8051 forum

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STATREAD:MOV A, #WTCMD ;LOAD WRITE CO...
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hello i downloaded the frequency counter project f...
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Tue Apr 16 2019, 12:23 AM
1) Can you explain what is the use of the p-n-p tr...
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Posted By kevinharsha
Sun Apr 14 2019, 06:26 PM
Hey! Thanks for the help! The circuit worked well ...
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Fri Apr 05 2019, 10:05 PM
Here is a version for the 8051.Make sure you add d...
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http://www.8051projects.net/download-d231-musical-...
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HiAjay is very busy with business right now so may...
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I had a couple of questions :-1) Can you upload a ...
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Can you post your full code.Do you have a serial t...
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Posted By WWSIERT
Wed Apr 03 2019, 01:20 PM
that is the image