180 Threads found on edaboard.com: 89c51 Interface
i am doing a final year project on an rf signalling system for busy zones.
it requires that i use a an rf transmitter and receiver and two microcontroller for both modules. i am using 89c2051 for thr transmitter and 89c51 for the receiver. i want to be able to save the zone data on the microcontroller and send it through the tr
Embedded Systems and Real-Time OS :: 11.07.2011 08:26 :: natasie :: Replies: 5 :: Views: 1931
I don't use PIC but i use 89c51 ,to interface beetween microcontroller and RS485 ,you need a interface chip.and you can use IC 75176 to implement interfacing beetween microcontroller and RS485 line.
Good luck !
Hobby Circuits and Small Projects Problems :: 11.01.2004 12:41 :: HSAMS :: Replies: 2 :: Views: 3165
I want to interface UM91214B/HT9315 Phone Dialer IC with 89c51 microcontroller. Can I directly connect row and column pins of this IC to the microcontroller?
Microcontrollers :: 27.01.2004 15:01 :: CMOS :: Replies: 3 :: Views: 1501
can somebody help me with the code for keyboard and lcd interface with atmel 89c51 chip.
Microcontrollers :: 27.03.2004 14:59 :: sukanya :: Replies: 8 :: Views: 6665
Do any body had interfaced DS1821 with 89c51 and the Temperature result should be displated on 16*2 LCD display,
If so please share me the schematic & source code for it, as i am urgent in need of it.
Microcontrollers :: 28.03.2004 11:09 :: mitesh :: Replies: 3 :: Views: 2279
i have interfaced a ds1287 with 89c51 , since i saw ur post , 2 days , i m unable to compose all the info in a format to send u , plz give me one more day and u will get schematic and code for it.
Microcontrollers :: 12.05.2004 21:52 :: seaspac :: Replies: 4 :: Views: 3685
how can i use MCU AT 89c51 as normal AT keyboard for 5/6 keys.I have searched the site but all the sites tell how to scan the keyboard. but i want to make the keyboard.
the circuit should send the KBD data and KBD clk for PC.
I have made the software in assambly but the problem is, when i make the line, low(by pressing any key )of MCU, code is ge
Microcontrollers :: 09.08.2004 10:59 :: Noman Yousaf :: Replies: 4 :: Views: 1460
you have got 2 options for controlling LED matrix display.....one is through serial port and other is parallel port...
If u use serial port then u would have to use some device like a Microcontroller / serial reciever to recieve data through serial port....
I normally use MAX 232 IC which converts serial port voltage levels to TTL leve
Electronic Elementary Questions :: 28.09.2004 05:00 :: starfish :: Replies: 3 :: Views: 4812
Could any body share the schematic of 89c51 based single board computer.
I mean development board with monitor program to download code from PC via serial port and provision for key board and LCD interface.
It would be very helpful.
Microcontrollers :: 03.10.2004 12:31 :: egemini :: Replies: 1 :: Views: 1597
The 89c51 dosen't have hardware SPI port there for you have to do it using I/O pins togel
What language are you using : C,ASM, BASIC ?
If you are using C you can adapt code from other controller's
Microcontrollers :: 07.10.2004 04:54 :: bobcat1 :: Replies: 4 :: Views: 2113
I am making a simple temperature measurement device. I?m using LM35 with 24-bit ADC and 89c51. Please tell me how to feed value from 24 bit adc to 8 bit registers of 89c51 and how to perform calculations for decimal (I?m designing for 0.1 degree Celsius accuracy). I have to display the result on 7-segment displays.
Microcontrollers :: 02.01.2005 15:07 :: semiconductor :: Replies: 11 :: Views: 3646
I am Searching for the various ways plus circuit diagram for connecting the LDR Sensors to the 89c51 ?C I/O ports!
I need the Sensor to give my controller a +5V Signal when its enabled and 0V Signal When its disabled! thats it, a simple one....but i need the "How to go about " and "How to do it" information! Thanks in advance![/col
Microcontrollers :: 28.02.2005 01:28 :: jith :: Replies: 9 :: Views: 5955
i need to connect the micro 89c51 into the
lan network via ethernnet
Anny sugestions ???????
Microcontrollers :: 05.03.2005 12:55 :: TheSniper :: Replies: 8 :: Views: 1612
Add some additional hardware and save your time.
Add additional FFs to catch and keep external events, then read this FFs periodically with appropriate routine in the main loop and take approprate action in another routine.
89c51 interrupt system is not so fast and good as some newer architectures (ARM).
Use polling with some add
Microcontrollers :: 28.04.2005 21:17 :: Hero :: Replies: 5 :: Views: 1059
If you apply 10V at the excitation pins, and put full weight on the load cell, it will give 2mv X 10V = 20mv output at the output pins..
That is quite small to be measured directly by the ADC inputs unless the ADC has a built in amplifier. So conventionally, you will need a low noise amplifier and an ADC to be able to read by 89c51.
Microcontrollers :: 18.05.2005 13:16 :: techie :: Replies: 8 :: Views: 2010
this circuit is used to measure light intensity using the following basic analog circuit .... now i want to use microcontroller (89c51) and adc -AD7922 (12 bit)
so that i can include some more functions and also 16 x 2 lcd . in the present circuit two pots are used one for zero setting and other for calibration in 741 section .
Microcontrollers :: 19.08.2005 00:28 :: vicky29 :: Replies: 4 :: Views: 1614
Most modems respond to standard AT command set. A basic modem connection is pretty simple.
1. Connect the modem serial port to the 89c51 serial port.
2. Send an ATDTnnnnnn command to dial the nnnnnn number.
3. Wait for CONNECT from the modem
Microcontrollers :: 04.09.2005 13:19 :: techie :: Replies: 4 :: Views: 1428
for a calculator you have to do part by part programming ..first learn to interface only keypad with 89c51 then proceed with lcd interface ..and after that go for calculator which then will be easy for you to understand since u r new to programming.after that if any problem tell us we will help you
Added after 1 minutes:[/c
Microcontrollers :: 22.09.2005 23:04 :: sush :: Replies: 6 :: Views: 2278
me want to interface a numeric printer that is model number m42v of epson with 89c51. can anybody guide me how to proceed.
help will be appreciated
Microcontrollers :: 22.09.2005 02:02 :: shaz :: Replies: 1 :: Views: 718
I am new to microcontroller, can anyone give me transmit & receive program to upload & download data between PC & 89c51 microcontroller.
Microcontrollers :: 19.11.2005 02:18 :: centiago :: Replies: 16 :: Views: 37254
i have done a slave module with 89c51 controller, now need a VB interface for the same. i am looking for the comm programing using VB, iam able to send the data and make a port active and deactive. when i request for the status i ensured that the controller is sending the data but dont know how to capture in the VB.
have any one worked on
Microcontrollers :: 21.11.2005 07:19 :: binu G :: Replies: 4 :: Views: 740
Please i need more info about the interface of DS12887 RTC with 89c51
Microcontrollers :: 19.12.2005 00:38 :: naveen kantiwal :: Replies: 2 :: Views: 1239
last night i was trying to interface ADE7754 with 89c51. I just gave 220 v AC voltage at Phase A input (via 1Mohm/1K resistor network) and read the value of AVrms register which is showing a huge value which changes with change in voltage. But the value is too large than maximum possible.
I doubt in one part of my code. Should the code be
Microcontrollers :: 16.01.2006 10:39 :: lats :: Replies: 1 :: Views: 823
I design a controller system using MCS51 (AT89c51) and I want the unit to be able sending and receiving message string to handphone via SMS using it's UART.
Kindly help me if you have any sample programs in assembler.
Thanks a lot
Professional Hardware and Electronics Design :: 02.03.2006 09:21 :: basid :: Replies: 13 :: Views: 9933
i am trying to interface a atmel 24c64 to the 89c51 mcu
i want to write four different datas to the ic and read it in different time
i have connected the sclk to p 3.0 and sdata to p3.1
can anyone give me the code for the same in assembly?
i am using a 12 mhz crystal
Microcontrollers :: 02.03.2006 09:54 :: sunish :: Replies: 1 :: Views: 1273
hi i am trying to interface external EEPROM 24xxx series with 89c51 using Keil C51. I found one application at:-
but only a short code is given along with circuit diagram. For full code you need to download the file given at bottom,saying "Download KEIL C51 example " but the li
Microcontrollers :: 13.05.2006 06:00 :: Chetan07 :: Replies: 3 :: Views: 2203
i wanna use a serial memory (AT24C1024) with 89c51/52.
i read the datasheet but i still don't know how to read and write exactly :cry:
anyone has experience on this???:?: or a simple sample???:?:
(i use assembly not c or c++)
thanks for any help
Microcontrollers :: 01.07.2006 16:53 :: shahab_sh :: Replies: 1 :: Views: 1140
can any one tell how to interface gsm modem with 89c51 microcontoller
Digital communication :: 07.07.2006 05:08 :: umikiran :: Replies: 2 :: Views: 957
can anybody tell me how to proceed to interface d ethernet ic 8900a with 8051 microcontroller?? :?:
i am doing a project for remote monitoring of devices controlled by 8051 using internet........for that i want to interface 8900a ic to d uC so that i can connect it to lan
Embedded Systems and Real-Time OS :: 26.08.2006 23:44 :: alvarorahul :: Replies: 1 :: Views: 820
I'm a new person in forum,my English not good.I have a project is "Control device in home via PC",and programming with VB6.
anyone have schematic circuit interface 89c51 with serial port,please send to me,thanks a lot
my email is:firstname.lastname@example.org
thanks and regards
PC Programming and Interfacing :: 30.09.2006 05:27 :: ngocky :: Replies: 15 :: Views: 12433
how to interface a dotmatrix printer to 89c51
Microcontrollers :: 18.10.2006 06:56 :: vibeesh :: Replies: 18 :: Views: 2345
using serial port how can i interface printer to microcontroller 89c51
Microcontrollers :: 19.10.2006 00:38 :: vibeesh :: Replies: 2 :: Views: 998
I am also looking for interfacing code of RTC HT1380 with ? 89c51 in assembly codes. As you are saying for datasheet of the RTC. Hence attached the same. Pl help if possible.
Microcontrollers :: 30.11.2006 01:43 :: mak_goel :: Replies: 4 :: Views: 1236
Help rquired to interface the RTC HT1380 with Micro 89c51 in assembly coding only as i dont know C.
Added after 4 hours 57 minutes:
Any body help!!!!!!!
Added after 39 seconds:
Any body help!!!!!!!
Microcontrollers :: 30.11.2006 05:59 :: mak_goel :: Replies: 9 :: Views: 3431
how to interface an lcd to 89c51 using 4 bit mode. am using lampex16200 pls send me manual of this controller
Microcontrollers :: 01.12.2006 01:53 :: vibeeshpv :: Replies: 7 :: Views: 6329
This is raghunath. I am developing an electronic board for an automatic cleaning system which contains level sensors, teperaturesensors and few limit switches.
In my application i have to sense temperature in a chamber when steam is allowed to pass. The temperature sensor i have choosen is LM35. I want to know how it can be interfaced to
Microcontrollers :: 15.02.2007 06:47 :: raghuchouta :: Replies: 21 :: Views: 21636
I need to interface an ADC0831(serial) to 8051 then to process its value
if a certian value is reached then respective messages to be sent to LCD (16X4).
Kindly help me for developiongs its prog. in c.
Microcontrollers :: 25.02.2007 14:51 :: MUDDASSAR :: Replies: 0 :: Views: 1914
I'm a year 3 student,i want to build Dotmatrix leds that interface to the key board!
who 's experient in this ,plz let me know !
Microcontrollers :: 10.03.2007 10:27 :: seanthearakh :: Replies: 2 :: Views: 1273
I'm a beginer & 89c51
I want to interface At 89c51 &AT 28C64.
plz help me both Hardware and soft C.
Microcontrollers :: 13.03.2007 12:25 :: seanthearakh :: Replies: 0 :: Views: 391
for a college project i require to generate a waveform of time period
T=50 microseconds continously from ports p1.1 and p1.2 using 89c51 ,
of which p1.1 should go high for 38us and go low
while p1.2 should go high after 2us remain high till p1.1 is high
and go low for remaining time period
i have written a program for the same and wor
Microcontrollers :: 03.04.2007 01:25 :: leoneil :: Replies: 6 :: Views: 868
I just bought a expensive SHT75 from my country, but i am poor in 8051 assembly language and need some guide to write the code.
i can understand and write some simple code like running leds,displaying a LCD.But when come to this sensor, how to read the signal,send and display the reading in LCD. How to do it?
I had read the datasheet of SHT75
Microcontrollers :: 23.08.2007 11:56 :: aaron8390 :: Replies: 3 :: Views: 1239
hi, i need program for interfacing serial,parallel,ethernet and USB using 89c51 in microcontroller.........please help me get it..............or otherwise send me the site where i can get....please reply soon.......
Microcontrollers :: 25.08.2007 23:09 :: satthamvij :: Replies: 2 :: Views: 837
The SHM75 sensor belongs to the I2C family and as a such needs two lines to connect with a microcontroller: SCK(clock) and SDA(data) .. see picture below ..
As you intend to use 89c51 you can select virually any two pins, for example P1.0 and P1.1 ..
Some designers use pins from P0 port because of their Open Drain configuration ..
Keep in mind t
Microcontrollers :: 11.10.2007 21:04 :: IanP :: Replies: 1 :: Views: 1504
Please can anyone help me to interface serial printer to 89c51....
I will donate 15 pts. if u give me the proper c code....
Microcontrollers :: 25.11.2007 06:27 :: nan_ishan :: Replies: 2 :: Views: 739
Please can anyone help me to interface serial printer to 89c51....
I will donate 15 pts. if u give me the proper c code....
Microcontrollers :: 27.11.2007 00:40 :: nan_ishan :: Replies: 1 :: Views: 635
Please can any one provide me C code for interfacing com port
with 89c51 using MAx232.
Thanks in anticipation.
Microcontrollers :: 12.12.2007 03:57 :: akshay_kul59 :: Replies: 4 :: Views: 2848
i am stuck at a project situation.
the requirement is:
using 89c51 microcontroller(Atmel)i need to provide
1> with 16 switches 16 relays are to be operated.
2> with same controller ckt, i need to provide I2C interface ( 24c04)
3> with same controller ckt, i need to provide serial communication.[
Microcontrollers :: 31.12.2007 09:09 :: ronydc :: Replies: 9 :: Views: 1351
i am working on a rf tranceiver using chipcon cc2500 and at 89c51
i would like to get some tips from you experianced people
can we directly interface the system to the 8051 pins?
people says that we have to configure the cc 2500 before using
how's it possible
will the normal spi interface program will work with the same? (...)
Microcontrollers :: 22.01.2008 23:57 :: microlab :: Replies: 21 :: Views: 6358
Can we interface more than one DS1307 with 89c51...
if yes... then problem comes that DS1307 has only one particular address...
Microcontrollers :: 30.01.2008 00:58 :: simrantogether :: Replies: 8 :: Views: 2380
anyone know how to interface energy meter used in homes with 89c51???
plz share some good links or ideas
Microcontrollers :: 16.02.2008 10:55 :: abbas1707 :: Replies: 1 :: Views: 661