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Recent content by Ramees raja

  1. R

    Air quality and co detector

    hi this code for mq7 sensor. it is in ccs pic compiler program mode. but i want code in hitech c. so please help me to convert it . i don't have the header file <lcd_B.c> and <16f877A.h> but i have <pic.h> & <pic168xa.h> please help...
  2. R

    Air quality and co detector

    Please give me details of mq135 sensor,the data sheet tells nothing please help i want to find diffrent gases amt
  3. R

    Air quality and co detector

    When mq7 sensor sense co,if it greater than a fixed value then uc pin connected with relay goes high and buzzer on. How to connect buzzer on relay ckt. Is it the rest of circuit dgm is ok please reply
  4. R

    Air quality and co detector

    Sorry ckt is below thanks
  5. R

    Air quality and co detector

    Hi check my ckt dgm,and reply if correction needed.pls reply to how to connect buzzer with relay. Thank yu
  6. R

    Air quality and co detector

    Thanks ron now,i have doubt in coding will yu please tell me what are the stages in coding for this and a link to fullfill my coding
  7. R

    Air quality and co detector

    Hai thanks for all valuable informations. Please help me to draw a ckt dgm. In my project their is a relay unit in output.i have no idea abt that,please help me to draw a relay unit ckt . the block dgm and details attached thank yu
  8. R

    Air quality and co detector

    What is the steps to draw a ckt dgm for this project please help me to draw it
  9. R

    Air quality and co detector

    Sensors 1,co sensor-code,mq7 2,air quality control sensor-code,mq135 lcd hitachi HD 44780 UC 16F877A ANALOG IP RANGE 8 POWER SUPPLY 5VDC THE AMT OF GASES AND CO IS DISPLAYED IN LCD IF SOME AMT OF CO IS DETECT THEN ALARM IS ON JUST A SIMPLF ALARM PLEASE HELP GUYS
  10. R

    Air quality and co detector

    Oscillator ckt is just for clock pulse,i have no idea about relay,i only know the above.i have only the block dgm,i have know the idea but not the specifications, please help
  11. R

    Air quality and co detector

    I have two sensors,one is carbon monoxide sensor and the other is semiconductor gas sensor. 16*2 lcd is used for displying amt of co and other gases.if sensors sense some amt of co which is greater than fair amt then alarm is turned on please help it is urgent
  12. R

    Air quality and co detector

    Hi i want to design a microcontroller based programable air quality and co detector device.in this project their is 2 sensors used air quality sensor and co sensor there is an alarm and lcd in the output i/p section_reset ckt,oscillation ckt,sensor1,sensor2 o/p section_lcd,alarm,relay...
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