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Wednesday, February 11, 2009

Interface of LCD with at89c51


This is ciruit diagram of interfacing of LCD with microcontroller 8051 family.
This project was to measure heart beat and to display on LCD.In this post we learn how to interface a LCD with microcontroller 8051, please note that here only circuit diagram is presented in this post. However, more literature about LCD programming, different circuit diagram and example codes in assembly language and c like c51 are given in other posts in this blog. The short summary and link of other post related to LCD interfacing with microcontroller is provided below. for further information please check these.

1. LCD interface with micro-controller 8051
This is very simple project to interface a lcd with micro-controller 8051.There are two well known method to send data from microcontroller to LCD.8 bit interface and 4 bit interface, both are discussed in this post.circuit diagram for 4-bit interfacing is also provided.
URL:-   http://microcontroller51.blogspot.com/2009/02/lcd-interface-with-micro-controller.html

2. Pin configurations of LCD
Pin assignment or Pin configurations of LCD and Instructions of LCD is discussed.
URL:-   http://microcontroller51.blogspot.com/2009/07/pin-configurations-of-lcd.html

3. Interface of 4 line LCD with 8051
The inteface and control of a bigger LCD with microcontroller at89s51 is very simple. I used a LCD of four lines having 80 charachter space on each line (4*40 lcd) sucessfully. The program is written in keil c51 Uv2 and is tested with UV3 also. In this post a larger in siz LCD is interfaced with microcontroller and example C-language program ( c51 code) is also given.
URL:-  http://microcontroller51.blogspot.com/2009/07/interface-of-4-line-lcd-with-8051.html

4. Liquid crystal display LCD
We use many items containing LCDs (liquid crystal display) every day.Function Description,Registers,Busy Flag (BF),Address Counter (AC),Initializing by Internal Reset Circuit., of HD44780 are discussed.
URL:-  http://microcontroller51.blogspot.com/2009/08/liquid-crystal-display-lcd.html
 
5. Interfacing of Graphic LCD Module to AT89S52

The Interface of a Graphic LCD with micro-controller 8051 family.In This post the interfacing of GLCD (Graphic LCD module ) with micro-controller 8051 family is discussed. the circuit diagram for interfacing graphical LCD to microcontroller 8051 is also given.
URL:-  http://microcontroller51.blogspot.com/2009/08/interfacing-of-graphic-lcd-module-to.html

6. Alpha numeric LCD interface with micro-controller
How to control the standard Hitachi-44780 LCD using an 8051 microcontroller family.Program for LCD 4line and 40 characters in keil C51 is also given. Proteus ISIS circuit diagram for interfacing LCD to 8051 is provided in this post.
URL:-  http://microcontroller51.blogspot.com/2010/01/alpha-numeric-lcd-interface-with-micro.html

7. Development of 4 bit Counter with 8051 display on LCD
 How to write a simple C program for 80C51 (8051 family microcontroller may Atmel or Intel 8051 or any other) micro-controller, compile it using keil and displayed in decimal format on the LCD. circuit diagram and code is provided.
URL:-  http://microcontroller51.blogspot.com/2010/06/development-of-4-bit-counter-with-8051.html

8. Implementing Calculator with microcontroller 8051
keypad,LCD interfacing to develop a calculator using microcontroller 8051 is discussed. circuit diagram and program methods are given.
URL:-  http://microcontroller51.blogspot.com/2010/08/implementing-calculator-with.html

9. Assembly Language program for LCD code
In this post some routine in Assembly language are written to interface lcd with microcontroller 8051. Assembly language programming for LCD interface with microcontroller 8051 is given steps by steps.
URL:-   http://microcontroller51.blogspot.com/2010/12/assembly-language-program-for-lcd-code.html
 
10. How to write Data on LCD
To learn how to write something on LCD with the control from Microcontroller.Liquid Crystal Display also called as LCD is very helpful in providing user interface as well as for debugging purpose. The most common type of LCD controller is HITACHI 44780 which provides a simple interface between the controller & an LCD. circuit diagram with code in assembly language is provided.
URL:- http://microcontroller51.blogspot.com/2010/12/how-to-write-data-on-lcd.html
 
11.  Address Counter (AC) of LCD
The address counter (AC) assigns addresses to both DDRAM and CGRAM. When an address of an instruction is written into the IR, the address information is sent from the IR to the AC. Selection of either DDRAM or CGRAM is also determined concurrently by the instruction.
URL:-  http://microcontroller51.blogspot.com/2010/12/address-counter-ac-of-lcd.html

12. LCD interfacing with Microcontroller 8051
LCD interfacing with Microcontroller 8051 and LCD overview and its theory is given in this post.
URL:- http://microcontroller51.blogspot.com/2010/12/lcd-interfacing-with-microcontroller.html

13. Liquid Crystal Display LCD Introduction
The HD44780 dot-matrix liquid crystal display controller and driver LSI displays alphanumeric characters and symbols. It can be configured to drive a dot-matrix liquid crystal display when interfaced with a processor. A single HD44780 can display up to one 20-character line or two 20-character lines.
URL:- http://microcontroller51.blogspot.com/2011/01/liquid-crystal-display-lcd-introduction.html

14. Heart rate (beats) Meter with Microcontroller AT89c51
The heart rate meter is used to measure the heart beats per minute from finger placing between the sensor. The sensor is made of simple photo resistor and LED. The pulses from the circuit are them amplified and converted into TTL logic pulses using comparator Operational Amplifier. LCD interfacing and implementation is a good ready example in this post.
 
An example program for LCD, which can be used in any project with little modifications.
 
16. Liquid Crystal Display LCD
The HD44780 dot-matrix liquid crystal display controller and driver LSI displays alphanumeric characters and symbols. It can be configured to drive a dot-matrix liquid crystal display when interfaced with a processor. A single HD44780 can display up to one 8-character line or two 8-character lines. The HD44780 supports 8 dot character fonts and 32 5 ´ 10 dot character fonts for a total of 240 different character
 
17. Programming Aspects of Moving message display project using 8051
In this post we will discuss the software or program or code written for moving message display project using microcontroller 8051.In this section, we will try to answer the issues related to the timings of the signals generated. The timing of the signal relates to the order in which an instruction or command is sent to the LCD along with the appropriate signal of control signals

21 comments:

  1. Dear Sir,
    Can we use LCD with only 2 data lines or 1 data line instead of using 4 data lines but without using any shift register, is it possible or not, if yes please give me some guidance. I will be very grateful to you.


    Thanks & Regards

    Saurabh Singh
    saurabh044@gmail.com

    ReplyDelete
  2. you can use this program for 2line lcd also, simple point is only try to write on the first two lines of the lcd.

    ReplyDelete
  3. Hello sir

    We are final year students .we are doing a project to display the measured voltage value from adc on lcd.we have connected adc to port2 of at89s52 and lcd to port 1.we are having problems with adc,could you please help us with code and programe.

    ReplyDelete
  4. Sorry for the stupid question. What is the best search engine http://google.com or http://yahoo.com?

    ReplyDelete
  5. hello sir..
    i am working on a project text editor with message moving display comprise of 30 keys.
    please give me circuit details of the above..

    Thanks!!!!!

    sushil kumar
    sushil_hathwal@yahoomail.com

    ReplyDelete
  6. dear sir i am doing electrical engineering. i am currently in 5th semester and i actually want to do my project on "microcontroller based brainwave for tension relief". so could you please help me by sending me its datasheet or circuit or anything realted to it. i shall be thankful to you...
    regards
    my email id: uolsux@hotmail.com

    ReplyDelete
  7. Sir i need a Microcontroller led interfacing circuit design for At89C51

    ReplyDelete
  8. Sir i need circuit diagram for AT89c51 interfacing with LED and LCD.

    ReplyDelete
  9. @ a_lwahab :-

    You want to interface LEDs and LCD both with microcontroller 8051.
    But you have not provided any details of your project and its functionality.
    You can find many post relted to interfacing of LCD with microcontroller 8051 in this blog incuding circuit diagram and code.

    at the same time there are many posts related to LEDs interfacing.

    for combine interfacing, you can send me some details of project via e-mail, i will check and help you with circuit diagram.

    ReplyDelete
  10. CHK_PULSE:
    SETB LCD_EN
    MOV A,DATA_LINE
    CLR LCD_EN
    JB ACC.7,CHK_PULSE
    POP ACC
    CLR LCD_RW
    RET..
    cmng to the part of the code, there is small problem here... this is an infinite loop as it is gng on repeating as the value in acc becomes 0ffh.. plz say me solution

    ReplyDelete
  11. CHK_PULSE:
    SETB LCD_EN
    MOV A,DATA_LINE
    CLR LCD_EN
    JB ACC.7,CHK_PULSE
    POP ACC
    CLR LCD_RW
    RET..
    cmng to the part of the code, there is small problem here... this is an infinite loop as it is gng on repeating as the value in acc becomes 0ffh.. plz say me solution

    ReplyDelete
  12. @ Hari :-
    The assembly laguage code, you presented above, is in-complete and difficult to understand what is going inside the code. Does this code relates to one of my post in this blog, then please indicate that post so that, i can understand your problem. OR it is your own code then send me complete code with circuit diagram and explaination what you suppose to do with it.

    ReplyDelete
  13. Sir:

    My project is to display temperature on lcd.

    I tried alot bt i am not able to write the vale of temp on it.

    i m having 16*2 lcd

    i m able to write only charecters n not the integer values, so sir can you plz help me by sending the program in c language.
    Waiting for your reply sir.

    ReplyDelete
    Replies
    1. hello pardip check this header file ,in this header file integer function as well as float also.include this header file in your main file
      #define lcd_data P0
      sbit rs=P3^7;
      sbit rw=P3^6;
      sbit en=P3^5;

      void init_lcd(void);
      void write_lcd(unsigned char);
      void cmd_lcd(unsigned char);
      void disp_lcd(unsigned char);
      void str_lcd(unsigned char*);
      void int_lcd(unsigned int);
      void float_lcd(float dat);

      void write_lcd(unsigned char dat)
      {
      lcd_data=dat;
      rw=0;
      en=1;
      delay_ms(2);
      en=0;
      }

      void cmd_lcd(unsigned char cmd)
      {
      rs=0;
      write_lcd(cmd);
      }

      void disp_lcd(unsigned char c)
      {
      rs=1;
      write_lcd(c);
      }

      void init_lcd(void)
      {
      cmd_lcd(0x02);
      cmd_lcd(0x38);
      cmd_lcd(0x01);
      cmd_lcd(0x0e);
      cmd_lcd(0x0c);
      cmd_lcd(0x06);
      cmd_lcd(0x80);
      }

      void str_lcd(unsigned char *s)
      {
      while(*s)
      disp_lcd(*s++);
      }

      void float_lcd(float f)
      {
      int t1;
      unsigned char i;
      t1=f;
      int_lcd(t1);
      disp_lcd('.');
      for(i=0;i<2;i++)
      {
      f=(f-t1)*10;
      t1=f;
      int_lcd(t1);
      }
      }

      void int_lcd(unsigned int n)
      {
      char a[5]={0},i=0;
      if(n==0)
      {
      disp_lcd('0');
      return;
      }
      else
      {
      while(n>0)
      {
      a[i++]=(n%10)+48;
      n/=10;
      }
      for(--i;i>=0;i--)
      {
      disp_lcd(a[i]);
      }
      }
      }

      Delete
  14. @ Pradip Mule :-
    There are a lot many projects and posts related your project, some (seventeen post and there links)are gven in this post, just scrol up and find them, scan all post, here you will find circuit diagrams, literature and codes for lcd interfacing with microcontroller, i hope you will get your required information. if still you feel any problem, then ask again.

    ReplyDelete
  15. hye dr rana..im nisa.. i need to do a project in microcontroller 8051 about timer which is using push button and lcd...i need to know the coding and circuit diagram to do this project. i hope u can help me as soon as possible..

    ReplyDelete
  16. hi, i want to LCD interfacing program in AT80C51.

    ReplyDelete
  17. hello sir
    We are final year students .we are doing a project to display the measured voltage value from adc on lcd.we have connected adc to port2 of at89s51 and lcd to port 1.we are having problems with adc,could you please help us with code and programe.

    ReplyDelete
  18. hello sir, am pavan i want code in c language.that to interface at89c51 micro controller with 32 pin LCD display please sent the code sir

    ReplyDelete
  19. hi sir,i need programming of interfacing of GSM,LCD AND MICROCONTROLLER.CAN you help me

    ReplyDelete
  20. hello sir, am pavan i want code in c language.that to interface at89c51 micro controller with 32 pin LCD display please sent the code sir

    ReplyDelete

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So, send me your problems and pay money for solution.ok
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All comments will be highly appriciated.

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diaplay with microcontroller interfacing 74ls138 74ls04 8051 16f877 (1) NAND (1) NOP in 8051 (1) NOR (1) NPN transistor (1) Non-insulated SCR (1) Nyquist A/D converters (1) Nyquist sampling criterion (1) OJ0800 DAC (1) ON-CHIP SERIAL PORT (1) OPAMP LM324 (1) Objective of the project based on microcontroller 8051 (1) On-Chip Clock Generator (1) Open (1) Operational Amplifier (1) Optical Sensor Subroutine (1) Optical sensor (1) Optocoupler and diac MOC3041 (1) PC (1) PC parallel port (1) PC side program for interfacing (1) PCM codec ICs or DSP interface ICs (1) PERIPHERAL INTERFACE PROJECT OF PRESSURE MONITORING (1) PGAs (1) PIC I2C (1) PROGRAM MEMORY (1) PWM with microcontroller 8051 for SCR or triac power control (1) Peripherals Keypad (1) Philips PDS51 development board (1) Pin assignment of liquid crystal display (1) Potentiometric (1) Potentiometric transducer (1) Pressure Sensing System (1) Pressure gauges and switches (1) Pressure monitoring with microcontroller 8051 (1) Pressure sensing and controlling (1) Pressure sensor and transducer (1) Printer Port's addresses in the BIOS Data Area (1) Program counter address (1) Programmable Gain Amplifiers (1) Programming Aspects (1) Programming Aspects of Moving message display project using 8051assembly language program for lcd (1) Project Description (1) Properties of graphite (1) Pseudo-Absolute Encoder (1) RAM of MCU (1) RAM of microcontroller (1) ROM-to-RAM ratio (1) RS-232 Level Converter (1) RS-232 Level Converters (1) RS-232 Standard (1) RS-232 communication (1) RS-232 serial communication (1) RS232 with 8051 (1) RS232 and Microcontroller 80s52 (1) RS232 and microcontroller schematics and C code (1) RS232 communication (1) RS232 serial communication (1) Receive Data (1) Receive Interrupt of 8051 (1) Register Banks of 8052 Microcontroller (1) Relative Humidity Project (1) Reluctive (1) Remote apps for PC and Mac (1) Remotely view (1) Resonant Wire (1) Routine interfacing LCD with 8051 Programmer's Corner. (1) Rs-232 smoke analyzer (1) SAKURA BOARD (1) SBUF and SCON (1) SBUF register (1) SCR control (1) SERIAL PORT REGISTERS (1) SMS Based Controlling Machines Using GSM Mobile and microcontroller 8051 (1) SN7447 (1) SN7447AN decoder (1) SN74LS373 Latch with 3-State Outputs and interface with microcontroller (1) Schematic Circuit Diagram Speedometer Accurate measurement of speed (1) Science/Research (1) Scratchpad Registers (1) Security Camera Systems (1) Selection of Humidity sensor or transducer or transmitter (1) Sensor (1) Sensors (1) Serial Communication (1) Serial Communication RS-232 (1) Serial Communication microcontroller to PC (1) Serial Interfacing of Microcontroller 8051 in Automatic Car Parking Project (1) Serial or Parallel (1) Servo Actuator and DC Motor. (1) Setting the Serial Port Baud Rate (1) Seven (1) Seven Segment Displays of Pressure Monitoring Project (1) Seven Segment Subroutine (1) Signal control on ADC0804 (1) Silicon Serial Number (1) Smartphone (1) Software Download (1) Software Freuency meter and pulse width measurement (1) Software writting procedures serial port communication (1) Solenoid Valve (1) Solenoid Valve Control System Using 8051 Microcontroller (1) Solenoid Valve Controls (1) Solenoid Valve Supplier (1) Start your car remotely (1) Static Power Switches (1) Stepper Motor Control System Interfaced with Personal Computer (1) Stepper Motor Control System Interfaced with Personal Computer serial port baud rate (1) Stepper Motor Subroutine (1) Stepper motor control in assembly lanuage (1) Strain Gage (1) Strobed Input (1) Supply Check Valves (1) Supporting AT commands (1) Synchronous Serial Communication (1) TEMPERATURE CONTROLLER (1) TEXT display (1) TIMER CONTROL (1) TRIAC control circuits (1) TTL (1) TTL CMOS logic level (1) TTL Compatible Inputs and Outputs (1) Temperature Controls (1) Temperature and Humidity Data Logger (1) Temperature sensors (1) Testing Circuit humidity sensing project (1) The Interface of ADC0804 with microcontroller 8051 (1) The MICROCONTROLLERS (1) The interface of DS17885 with at89c51 (1) Timer and counters circuits (1) Timer and counters of 8051 (1) Timer/counters (1) Transducer Types (1) Transmit Data (1) Two types of connectors are used for RS232 communication (1) U shaped tubes (1) UP and Down counter (1) USB programmer of microcontroller (1) Ultimate PC Remote Control (1) UltralISO (1) Understanding 8051 (1) Universal Blue Tooth controller software (1) Universal PC remote control from your phone or tabletRemotely browse your (1) Use of MICROCONTROLLER in Pressure Monitoring Project (1) VB6 RS-232 serial communication example program with microcontroller 8051 or PIC or AVR (1) VB6 serial interface (1) VLC (1) Von Neuman architecture (1) WDTV Media Players Remote app (1) WIN-Remote (1) Waveform Digitizer Capturing (1) Weather AnemometerRoom HumidityHome HumidityHumidity Cabinet (1) What are the time trigger applications (1) What is null modem cable (1) Wi-Fi Based Home Automation System (1) Wifi (1) Windows Media Player (1) Windows PC over Wi-Fi or Bluetooth (1) Windows Phone 8 and BlackBerry (1) Wireless Humidity Sensor (1) Wireless sensor based Vehicle central Lock Control System using Microcontroller (1) XBMC (1) XOR (1) ZERO-CROSS OPTOISOLATER TRIAC DRIVER OUTPUT MOC3041 (1) Zero crossing Optocoupler MOC3041 (1) access control car (1) accuracy of adc (1) addresses in hexadecimal are 378h (1) algorithm for pulse width measurements (1) alphanumaric LCD (1) analog input voltage to the ADC (1) analog temperature sensor (1) analog to digital conversion (1) analog voltage signal generation of 0 to 10V (1) analog-to-digital converter (ADC) (1) and 37Ah (1) and DS1685 PC real-time clocks (1) and Storing (1) android gmote server linux (1) android market (1) android remote (1) anode (1) apps for special education (1) assembly code circuits (1) assembly code projects (1) assigned devices LPT1 (1) aston martin (1) at89c51 as counter (1) atmel 2051 (1) atmel humidity Assembly Language code (1) atmel serial eeprom (1) autocop car security system (1) automatic car parking system using microcontroller (1) automatic car parking system with microcontroller (1) automatic control systems (1) avr i2c (1) best wireless camera security system (1) better resolution (1) bigger LCD (1) biomedical instrumentation (1) blocked motor start rotating (1) blue control modern (1) board development and fabrication (1) brown out detector (1) build simple calculator using keypad (1) buzzer siron (1) byte read (1) c language code (1) c language program (1) c++ code (1) calibration of ADC and DACs (1) capacitive (1) car parking and microcontroller (1) carbon dioxide (1) carbon monoxide (1) characteristics of analog sensor (1) charging the battery (1) circuit design for a elevator (1) circuit diagram (1) circuit diagram for intestinal sound detector (1) circuit diagram multiplex led (1) circuit diagram of moving message display (1) circuit diagram of serial communication via rs232 (1) circuit diagram of the microcontroller project for humidity and clocking (1) circuit diagram to interface LCD with Microcontroller 8051 (1) circuit disgram of stepper motor (1) circuit prototyping (1) clock vis (1) clocked out (1) code (1) code for gsm modem interfacing with p89v51rd2 microcontroller (1) code for microcontroller (1) commands of lcs (1) comminication (1) common (1) common 8N1 format (1) communicating direct with the aircraft computer (1) communication of the data between PC and RAM. (1) compatible digital interface (1) computer (1) condition (1) conio.h (1) construction of a pressure sensing system using 8051 (1) control cars remotely (1) control solid state relays (1) control stepper motor with 8051 (1) control system with 8051 (1) controller 8051 led display (1) convert the analog voltages to digital signal (1) cotton industry pressure monitoring project (1) crestron prodigy remote control (1) crestron remote control system (1) crestron universal remote control (1) current to voltage conversion circuit (1) current-carrying capacity (1) dac interfacing with 8051 microcontroller circuit diagram (1) data acquisition system using 8051 (1) data communication (1) data loging (1) database editor (1) db9 cable (1) db9 connector (1) db9 price (1) db9 serial (1) db9 serial port (1) debugging testing (1) decimal output value of an 8-bit ADC (1) decoded 74ls138 (1) designed pressure sensor and transducer (1) diagram (1) difference between timer and counter microcontroller (1) digital clocks and digital watches (1) digital clocks and watches (1) digital converters (1) digital electronics (1) digital gate 74LS08 (1) digital logic (1) digital presentation of pressure (1) digitally operated valve (1) directly converts displacement (1) disk (1) display (1) dos.h (1) download codes for free (1) download gmote (1) dsp i2c (1) duty cycle controller (1) easy way to monitor pulses from heart on finger (1) electromagnetic (1) electromagnetic switches (1) embedded system products (1) emission (1) emulator kit (1) encoder (1) ericsson at command microcontroller (1) example programs (1) exit gate motor (1) external AT24C512 EEPROM memory (1) external and internal counters of 8051 (1) flash architecture (1) flashing text message (1) flow measurements (1) flowrate height of fluid (1) for media players (1) free remote apps iPhone and iPod Touch (1) free softwares full versions (1) frequency counter (1) frequency counter in proteus (1) fullversions (1) gmote (1) gmote 2.0 (1) gmote connection problem (1) gmote vs gmote remote (1) gom player (1) graphics.h (1) gsm control 8051 (1) handshaking and control (1) hardware media players (1) heart beat counter using microcontroller 8051 (1) hex 24 to bcd 8052 (1) hexagonal (1) hidden switches (1) hole (1) home appliance control (1) home automation (1) home security system (1) home security system microcontroller code (1) homemade materials (1) how clear lcd screen (1) how to calculate the checksum? What are HEX files? 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(1) microcontroller board to control Solenoid Valves (1) microcontroller connect pc (1) microcontroller interface with LCD (1) microcontroller pwm (1) microcontroller timer (1) microcontrollers or microprocessors (1) microprocessor assembly language code (1) mini project interfacing microcontroller pressure sensor (1) motor protection (1) mouse pointer (1) moving message display using 8051 microcontroller (1) multiplex LED display (1) multiplex addressing (1) multiplex input (1) multiplex seven segment six digit display (1) multiplexed address and data bus (1) nios i2c (1) noise problem in circuit (1) optical sensor in car parking (1) optocoupler circuit diagram (1) optocoupler interfacing with microcontroller (1) oscillators frequency (1) output PINs of ADC (1) oven proteus optocoupler (1) page read (1) parallel port of PC (1) parallel port programmer (1) pc i o ports (1) photoconductive (1) photovoltaic (1) plump tomato (1) pneumatic pressure (1) pneumatic solenoids (1) port expander (1) power controller (1) pressure sensor adc (1) pressure transducer or proximity (1) pressurized fluids (1) program (1) programmable frequency (1) project for at 89s51 (1) proteus i2c (1) prototype (1) proximity sensor for using liquid level sense connect with microcontroller (1) pulse counter (1) pulse rate of a human heart (1) pulses (1) ratiometric (1) real player (1) receiver and transmitter (1) reg51.h (1) repeatability of results (1) resistance thermometers and thermocouples (1) resistive (1) resolution of adc (1) resolution of sensor (1) road side display boards (1) rpm meter (1) rtc ds1307 based alarm controller avr microcontroller (1) save power motor (1) save your water resources (1) scanner project (1) schmitt-trigger (1) scrolling message (1) scrolling text (1) security car alarm system (1) segment (1) sensors based data acquistion system 8051 (1) sensors based on data acquistion system using 8051 (1) sensors such as a pressure sensor (1) serial data interface between eeprom and microcntroller (1) serial eeprom (1) serial mode of communication (1) serial port (1) serial port RS 232 on 9600 baud rate (1) serial port communication (1) serial port data transfer (1) serial programmer (1) shift registers (1) show image on Graphic LCD (1) sigma-delta modulation (1) signal processing (1) simple for 8052 interfacing project (1) smart phone (1) smoke emission machine (1) smoke emission testing machine (1) smoke opacimeter (1) software (1) software for SGM modem (1) software to acquire data on PC (1) speed of adc (1) stability in response (1) stand-alone 8051 (1) stepper motor 6 wire connection block diagram (1) stepper motors (1) stepping sequences to motor (1) subroutines for lcd (1) sulphur dioxide (1) system abstract car security (1) tachometer sensor (1) tank over flow (1) temperature furnace (1) temperature measurement (1) temperature monitoring and control projects (1) temperature sensor using 8051 and adc (1) text light scrolling (1) textile industry pressure monitoring project (1) thermocouple (1) three stories lift (1) timer (1) touch cases (1) touch firmware (1) touch unlocker (1) transducers (1) transferred to micro controller (1) triac control (1) triac control circuit switches (1) triac lighting-control circuit (1) uln2003 (1) universal remote control android app (1) unln 2003 interface with microcontroller (1) use and types of Analogue Sensors (1) using 8051 counter (1) vehicle security (1) velocity (1) velocity measurement (1) verilog i2c (1) vertical scroll (1) water (1) water level monitoring and control using microcontroller 8051 (1) weatherstation (1) which is better for messuring liquid pulse width (1) which physcial quantity is measured with analog sensors (1) wifi automation (1) wireless car alarms (1) working memory model (1) write byte (1) 微控制器项目和概述 (1)