Project: Fan Controlling System

Discussion in 'The Projects Forum' started by malith_mnc, Jun 20, 2008.

  1. malith_mnc

    Thread Starter New Member

    Jun 20, 2008
    1
    0
    I'm going to build a AC fan controlling system according to the temperature. In simple words, the fan should be able to automatically control its speed according to the temperature of the environment. I hoped to use PIC16F877 and LM35 temperature sensor. I found these problems..

    1. How to convert 5V/DC current from PIC to 230V/AC current in fan
    2. Should i use PID controller? how?
    3. Do PIC 16F877 has enough memory to do this?

    Can u please give ur suggestions....
     
  2. losi

    New Member

    May 28, 2009
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    0
    help me please
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    That is a bit elaborate - why not use a thermostat to do the controlling?

    If you need to use the PIC, use a solid state relay to directly control the fan. It is not practical to try to step up 5 volts to 120 AC.
     
  4. ELECTRONERD

    Senior Member

    May 26, 2009
    1,146
    16
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