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 Posted - 07/09/2007 : 3:55:23 PM
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Digital visitor counter is a reliable circuit that takes over the task of counting Number of Persons/ Visitors in the Room very accurately. When anybody enters into the Room then the Counter is Incremented by one and when any one leaves the room then the Counter is Decremented by One. The total number of Persons inside the Room is displayed on the seven segment displays.
The microprocessor do the above job it receives the signals from the sensors, and this signals operated under the control of software which is stored in the Memory. The sensors are made with help of LDRs which are Light Dependent Resistors, whose Resistance is inversely proportional to the Light falling on it. The Laser Torch is used as the Light source and it is focused on the LDRs, the Microprocessor continuously watches the LDRs.
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Country:  India ~
Posts: ~
Member Since: 01/06/2007 ~
Last Visit: 22/08/2008
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Posted - 22/09/2007 : 5:54:24 PM
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| i want the program for digital visitor counter.pls mail me immediately |
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Country: India ~
Posts: 1 ~
Member Since: 22/09/2007 ~
Last Visit: 22/09/2007
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Posted - 23/09/2007 : 3:03:41 PM
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Posted - 15/10/2007 : 12:16:08 AM
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sir,
can plz tell me from where to get the required ic's & other things & how much it would cost around?
Also it will be helpful if you can help in making an 8085 microprocessor based project to control pully's speed rate . |
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Country: India ~
Posts: 8 ~
Member Since: 13/10/2007 ~
Last Visit: 29/02/2008
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Posted - 15/10/2007 : 11:28:43 AM
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Posted - 16/10/2007 : 12:54:47 AM
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| actually I want to make a system (used in Czocharalski method) for pulling out a mass with a constant speed in practical environment using microprocessor 8085. |
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Country: India ~
Posts: 8 ~
Member Since: 13/10/2007 ~
Last Visit: 29/02/2008
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Posted - 16/10/2007 : 09:31:59 AM
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Posted - 21/10/2007 : 4:32:57 PM
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can u suggest some solution for the given problem urgently
Problem
DESIGN and IMPLEMENT an electronic circuit for the following task.
You have five torch bulbs and you have to switch them
as per the given truth -table (change state with a two second delay).
B4 B3 B2 B1 B0
1 1 0 0 1
1 1 0 1 0
1 1 0 1 1
1 1 1 0 0
1 1 1 1 0
0 1 0 0 1
0 1 0 0 1
0 1 1 0 1
0 1 1 1 0
0 1 1 1 1
1 0 0 0 1
1 0 0 1 0
0 0 0 1 1
0 0 1 0 1
0 1 0 0 0
1 0 0 1 1
1 0 1 0 0
0 0 0 0 0
1 0 1 0 1
0 1 0 1 0
0 1 1 0 0
1 0 1 0 1
1 1 1 1 1
Note:-
1. A zero in the truth-table indicates that the bulb is OFF
and a one indicates that the bulb is ON
2. After truth-table the cycle is repaeted i.e., after the last state
( 1 1 1 1 1) the next state will be (1 1 0 0 1)
3. The torch bulb used must operate within the voltage range 1.5V to 9V
Rules:-
1. Use of microcontrollers and microprocessors is NOT allowed.
2. Use of mechanical/electro-mechinical parts any where in the circuit is
NOT allowed.
Judging critarion:
1. Cost effective circuit
Bonus Points:
1. Design the circuit, such that the inter state delay is variable
(and can be adjusted befor switching on the circuit)
Example:
B4 B3 B2 B1 B0 Inter state delay in seconds
1 1 0 0 1 2
1 1 0 1 0 5
1 1 0 1 1 1
1 1 1 0 0 7
1 1 1 1 0 1
0 1 0 0 1 1
0 1 0 0 1 1
0 1 1 0 1 9
0 1 1 1 0 2
0 1 1 1 1 1
1 0 0 0 1 2
1 0 0 1 0 3
0 0 0 1 1 7
0 0 1 0 1 9
0 1 0 0 0 1
1 0 0 1 1 2
1 0 1 0 0 6
0 0 0 0 0 8
1 0 1 0 1 1
0 1 0 1 0 2
0 1 1 0 0 1
1 0 1 0 1 2
1 1 1 1 1 1
The delay range will be [1-9]
Hints (These are just hints and NOT specifications)
1. To experiement you can use LEDs instead of torch bulbs.
2. You can use the following ICs
flip-flops, counter, timer(555)
3. You can use "transistor as a switch".
4. You can use 7805 as a voltage regulator.
5. What is inside the IC, ULN2003 ?!?!?!?!?!?!?!?!!!! |
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Country: India ~
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Member Since: 21/10/2007 ~
Last Visit: 21/10/2007
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Posted - 22/10/2007 : 3:56:08 PM
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| how to feed this program in 8085 microprocessor |
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Country: India ~
Posts: 2 ~
Member Since: 22/10/2007 ~
Last Visit: 22/10/2007
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Posted - 22/10/2007 : 3:57:16 PM
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| how seven segment display is connected to out put of 8085 . |
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Country: India ~
Posts: 2 ~
Member Since: 22/10/2007 ~
Last Visit: 22/10/2007
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Posted - 22/10/2007 : 6:08:54 PM
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If the inner state delays are fixed then you can design it with IC555 as a clock generator and its output is fed to a 23state counter for each counter output you can use diodes to get the desired output.
But for variable delays you should need seperate clock for each outputs.
J.Binu
Click here to buy fully finished MIcrocontroller Project Kits |
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Country: India ~
Posts: 478 ~
Member Since: 01/06/2007 ~
Last Visit: 22/08/2008
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Posted - 22/10/2007 : 6:10:46 PM
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All the programs published here are should be entered through the trainer kit.
You cant connect displays directly to the 8085 only through 8255 is possible.
all the inputs and outputs should be connected to the 8085 through 8255 PPI.
J.Binu
Click here to buy fully finished MIcrocontroller Project Kits |
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Country: India ~
Posts: 478 ~
Member Since: 01/06/2007 ~
Last Visit: 22/08/2008
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Posted - 31/10/2007 : 09:19:59 AM
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sir plz give me details of accessories employed in electronics security system projects based on 8085 microprocessor projects
amjad khan |
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Country:  Pakistan ~
Posts: 1 ~
Member Since: 30/10/2007 ~
Last Visit: 05/11/2007
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Posted - 01/11/2007 : 2:21:52 PM
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Posted - 05/11/2007 : 1:00:08 PM
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hello,
i want to know the specifications of *LDRs* used in **DIgital Visitor Counter project**.
please help me..... |
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Country: India ~
Posts: 3 ~
Member Since: 28/10/2007 ~
Last Visit: 02/03/2008
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Posted - 15/11/2007 : 9:48:50 PM
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--------------------------------------------------------------------------------
hello,
i want to know the specifications of *LDRs* used in **DIgital Visitor Counter project**.
please help me.....
plz reply sir, its imp for me as i have to start the project now...
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Country: India ~
Posts: 3 ~
Member Since: 28/10/2007 ~
Last Visit: 02/03/2008
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