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  1. V

    ac motor pump control using microcontroller ?

    which transistor I have to used to interface relay to mcu , also where to connect two wires of motor?
  2. V

    ac motor pump control using microcontroller ?

    how to interface the Relay to microcontroller (8051)? Relay has 5 pins I don’t understand how to interface relay to 8051.I found below image. I think I have to do same as showing in circuit pin 2 connected to port pin of mcu pin 3 connected to ground where to connect two wire of water pump ?
  3. V

    ac motor pump control using microcontroller ?

    http://blowtech.blogspot.in/2013/08/relay-concept-in-8051-microcontroller.html In this link ,there is transistor and resistor connected with 8051. I have doubt, can we interface relay directly to 8051 port ,or I have to use resistor , transistors , other Ic ?
  4. V

    ac motor pump control using microcontroller ?

    I just asked for confirmation and safety. I have no doubt, the specification of relay match with pump water requirement
  5. V

    ac motor pump control using microcontroller ?

    pump motor SPECIFICATIONS: Power rating : 0.37kW/0.5 Hp Pipe Size : 25*25 Suction & Delivery Voltage range : 180 to 240 Volts Head : 6 to 28 meters please look at Relay http://www.shopclues.com/relay-12v.html?gclid=CNXUxJWvxsgCFVgVjgodLvoD9w&gclsrc=aw.ds Is it suitable for that pump...
  6. V

    ac motor pump control using microcontroller ?

    there are many type of relay's which one select to control 0.5 H water pump
  7. V

    ac motor pump control using microcontroller ?

    Hello I need help. can we control ac motor pump using microcontroller ? If yes then how to control ac motor pump? what I need , relay or motor driver Ic. motor pump run for 3 minute than turn off for 2 minute, do the task continuously
  8. V

    Software to program AT89s52

    I got the solution If I use AT89s52 then, I need to buy USB ISP programmer because AT89S52 doesn't have serial bootloader If I use P89V51RD2 than I can program with serial port which is already in development board Now I am using P89V51RD2. If I am not wrong. my compiler should be Keil...
  9. V

    Software to program AT89s52

    Hello I need help to find suitable software to program AT89s52 (look development board ) AT89s52 support Keil compiler , my Laptop have serial port , window which suitable software is used to program AT89s52 ?
  10. V

    automatic water pump

    mcu pin---> motor driver IC ---> pump motor I am seeing only two connection of pump motor (supply ) how to connect pump motor with MCU?
  11. V

    automatic water pump

    which type of valve are you talking ? I am thinking , mcu pin---> motor driver IC ---> pump motor set time by programming mcu
  12. V

    automatic water pump

    Hello I want to make automated system that will control flow of water on basis of time water pump motor Voltage: 12V DC Flow capacity:1 Litres per minute microcontroller : 8051 example If I need 1 Litres water then turn on water pump for 1 minute If I need 2 Litres water then turn on...
  13. V

    I2C programming ?

    actually I am interfacing RTC with microcontroller and LED. actually I have prototyping KIt (cortex m0). I only need c code. I want to control LED using real time clock via I2c pins Set alarm for 5 second (automatically turn on LED for 5 second ) Set alarm for 3 minute (automatically turn on...
  14. V

    I2C programming ?

    Hello , I need help to understand I2C programming for Microcontroller. 1. Initializing I2C 2. start I2C 3. stop I2C 4.ACK for I2C 5. NAK for I2C I am writing function one bye one. if there is any mistake. let me know 1. Initializing I2C void I2C_Init() { SDA = 1; SCL = 1; } 2...
  15. V

    Rest in Peace, Kris

    I'm really shocked Its very sad for me. I don't have word for you Kris. I will always miss you Kris
  16. V

    scroll message on an LCD...

    yes , because I need to display message continuously. I looked following link for loop http://en.wikibooks.org/wiki/X86_Disassembly/Loops
  17. V

    scroll message on an LCD...

    NO ,I did google search for assembly loop we can create loop using some assembly Instruction(jmp, djnz....) I think I need infinite loop I am explaining example of loop loop : MOV R1 #54h DJNZ R1 SJMP loop
  18. V

    scroll message on an LCD...

    I Did some google search. I looked some tutorial. I have divided code into subsection. I don't understand which section is wrong LCD command ORG 0H MOV A,#38H ; command ACALL COMMAND ;call command ACALL DELAY ;give LCD some time MOV A,#0EH ;display on, cursor on ACALL...
  19. V

    scroll message on an LCD...

    could you please explain with small example ?
  20. V

    scroll message on an LCD...

    Hello , I am making small project on software Microcontroller 8051 language assembly assembler- 8051 IDE source code ORG 0H MOV A,#38H ; command ACALL COMNWRT ;call command ACALL DELAY ;give LCD some time MOV A,#0EH ;display on, cursor on ACALL COMNWRT ;call...
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