http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. Thu, 08 Jan 2009 23:27:00 -0800 http://backend.userland.com/rss092 sir , i am using seven segment display for my project, actually i am not much familiar with the seven-segment-display,i just want to know its configur <noauthor@nospam.com> http://www.8051projects.net/forum-t9400.html the pin/segment configuration is same for both SP5501 and SP5503 but the difference is in Pin 3 & 8, they connect to Ground in SP5503 and to V+ i Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html sir,in the last post i asked u a very silly question,actually i was not able to express my doubt properly,by connection procedure i wanted to mean the priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html thanx sir,i'll try 2 correct my connection.sir,i have tried 2 correct my program codeiam enclosing it once more,the problem is that when i simulate my priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html hello priya 123,use this forum for help when your preliminary search doesn't give you good results.before posting your queries try googling, don't exp Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html http://www.iguanalabs.com/7segment.htmhttp://esd.cs.ucr.edu/labs/dec_counter/dec_counter.html abbas1707<abbas@nospam.com> http://www.8051projects.net/forum-t9400.html Hi,Please ensure your seven segment display is common cathode or common anodesince Seven segment display is nothing but bunch of LED's, which are avai Shailesh NAYAK<nayaktel@nospam.com> http://www.8051projects.net/forum-t9400.html priya,please mention the part no. of ur LED display that u are going to use so that we can determine the connection ciruit required by u. listed belo pdi33<islurpundalik@nospam.com> http://www.8051projects.net/forum-t9400.html sir, the part number of my LED(7 segment display) is SP5503. please provide me the details of this chip and its connection procedure. thanking u. priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html Hello priya123,i am Shocked to find that you are writing program to connect 7-seg display without knowing how to test a 7-seg display ? use some ele Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html check this link. it will provide u detailed pin description of various LED displays.http://www.kwalityindia.com/main.htmlthe display u are using is th pdi33<islurpundalik@nospam.com> http://www.8051projects.net/forum-t9400.html for my project as i am using common cathode 7-segment display,i have sent these values .please tell me whether these are the correct valueshex no . priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html hi priya, seems u have not read my previous post carefully. I have given a link to a page which contains the pin description of the LED displays.Just pdi33<islurpundalik@nospam.com> http://www.8051projects.net/forum-t9400.html sir,i have gone through the description of the chip KLS5XX.i have connected the following port pins of my microcontroller(8051) with the following se priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html Hello Priya,there are few things you need to know :1) Micros like 8051 are good at sinking Current than sourcing current (2 mA); so its better to use Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html sir, i have connected the entire circuit on the breadboard.i have used separate resistors for every display,but when i turn on my circuit the 7-segmen priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html Are you NUTS ?3) there is one more problem with Common cathode type - at the time of power on since all the ports are inputs i,e logic 1's your displa Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html i have connected an ADC with the microcontroller& then at port1 i have connected this 7-segment display.data lines of ADC are also connected with Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html sir,i know i am disturbing u all too much but i am undone,anyways,u told me to put MOV P1,#00h in my program code,i have put it at the disp_7segment s priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html CODE:setb p2.5
setb p2.6
intr bit p2.7
setb intr
adc_port equ p1
adc_val equ 30h
voltage_val equ r3
back: clr wr sashijoseph<sashijoseph@nospam.com> http://www.8051projects.net/forum-t9400.html hi priya,i have already mentioned earlier and would like to repeat that please mention the definition of various variables like rd/wr.etc. and also th pdi33<islurpundalik@nospam.com> http://www.8051projects.net/forum-t9400.html sir, here i am describing the hardware connections of my project------------------FOR ADC(0804)PIN 20: supply voltage +5 voltsPIN 18---PIN 11:these a priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html PIN 18 CONNECTED TO PORT P1.0(microcontroller 8051)PIN 17 CONNECTED TO PORT P1.1PIN 16 CONNECTED TO PORT P1.2PIN 15 CONNECTED TO PORT P1.3PIN 14 CONNE Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html sir,can u please provide me a brief description of the chip SP5501(common anode) or give me any link where i can get its detailed datasheet. priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html sir,please tell me where i can find the datasheet of SP5501 or please givemethe datasheet of any other chip equivalent tio that.i had gone through the priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html hi priya, here is the clip for the connection diagram from the kwality.com site. use any one of the two displays as the connections are same. also the pdi33<islurpundalik@nospam.com> http://www.8051projects.net/forum-t9400.html thanx a lot pdi33 sir,my project is still not working as arun sir suggested I have connected the seven-segment display to a separate port P3 and have priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html Hello Priya,i appreciate your "Never Give up" attitude, i think the whole code is unnecessarily made complicated, here is my function steps to display Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html Hello priya,to help you out from frustration, here is my code, i hope this solves your problem,stick to the comments in the program and rewire your co Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html sir, in this project I am using a single seven-segment display,and in the earlier posts I have given the description of my entire circuit connection. priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html thanx arun sir 4r ur code ,it helped me a lot but the fact is that it is not totally according to my circuit .I havementioned the logic of the program priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html Hello Priya, i am sorry to say that this is one of the worst code i have seen so far, you ask why ?1) what ever variables you have declared are not us Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html thanx a lot arun sir for tracking my mistakes,I am trying to build a data-acquisition system by using adc and microcontroller. i have already develope priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html Hello priya123,here is my code in two versions : ver A - displays 3 digit decimal on Common Anode Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html hello sir,your program works perfectly, i have tried it and have learned new concepts in asm programmingnischay kumar nischay kumar<nischay.kumar@nospam.com> http://www.8051projects.net/forum-t9400.html thanx arun sir,your program code really helped me a lot,but still there is one doubt which i want to make it clear . i am using ADC(0804) in free-run priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html Hello priya123, very late reply, about the ADC in free running mode , your current setup is not Free running mode- in the free running mode, the ADC Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html sir,please provide me the pin configuration of LM35 and LM34 sensors or sir,please give me any link from where I can get the pin configuration. priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html Look here : http://www.facstaff.bucknell.edu/mastascu/elessonshtml/Sensors/TempLM35.htmlGoogle will give you umpteen links...do use it. sashijoseph<sashijoseph@nospam.com> http://www.8051projects.net/forum-t9400.html hello sir, thanx for ur information on LM 35 sensors,could u provide me some more information about LM 34 sensor(fahrenheit sensor) ,its p priya123<PUMK_2007@nospam.com> http://www.8051projects.net/forum-t9400.html hi mr aruni need help in my problem,i have connected a thermocouple through amplification circuits and then the voltage is input to adc0804 ,i need a mohannad100<engg_msc@nospam.com> http://www.8051projects.net/forum-t9400.html Hello friend,Pl. check my previous posts in this thread (page 4) i have already given the full codes with comments, they are for single 7 seg LED disp Arun Kumar V<nura1002003@nospam.com> http://www.8051projects.net/forum-t9400.html