Discussion in "Project Doubts" started by    isha    Jul 13, 2007.
Fri Jul 13 2007, 09:01 AM
#1
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???????
Tags automatic room light controller with visitor countdigital visitor counterworking of sensor
Fri Jul 13 2007, 09:18 AM
#2
i just checked.. the controller used is same 89c2051 here is the screenshot of the circuit. you might have downloaded a wrong file i think.
 isha like this.
Fri Jul 13 2007, 03:08 PM
#3
sir, this is the screen shot of circuit diagram of project "digital visitor counter" not that of the "automatic room light controller with visitor counter" ...........

plz check that ... and also the code available for this project is not complete ,, it is only the following;

INCLUDE reg_51.pdf

P1 EQU LEDS


ORG 000H

START:MOV LEDS,#0FFH
CALL DELAY
MOV LEDS,#00H
CALL DELAY
JMP START1



;**********************************************************
DELAY:
MOV R1,#4FH
REP2: MOV R2,#0FFH
REP1: NOP
DJNZ R2,REP1
DJNZ R1,REP2
RET
;**********************************************************




END



plz reply soon

thanks
Fri Jul 13 2007, 04:07 PM
#4
ok might be my mistake.. i will check and get back to you.. and.. keep the doubts about a single project in a single thread.. so i am going to delete the other thread you created ok
Fri Jul 13 2007, 04:21 PM
#5
Isha can you please wait.. i need to contact the Author of the project and inform him about the problem. His projects contain so many error.. :mad
Fri Jul 13 2007, 04:29 PM
#6
Isha have a better option for you.. if you simply modify the digital visitor counter project.. add some functionality for switching off the bulb when counter is 0 and switch on as soon as count is greater than 0... that will be a good option... if you want to try it..
 isha like this.
Fri Jul 13 2007, 05:55 PM
#7
Thanks sir
i think i should first try "digital visitor counter" and then i'll try to modify that...

can u plz give some details of circuit diagram of "digital visitor counter" , functionality of each component , specially that of transistors , seven segment displays and LDRs... how do they work???
Fri Jul 13 2007, 06:14 PM
#8
check you previous post.. i actually explained the working of digital visitor counter.. see your last posted thread..
Sat Jul 14 2007, 08:39 AM
#9
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)
 isha like this.
Tags digital visitor counterworking of sensor
Sat Jul 14 2007, 09:49 AM
#10
check this post where i explained the working
http://www.8051projects.net/forum-t1190.html


[ Edited Sat Feb 16 2008, 09:14 AM ]

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