Lighting system IR remote control

Discussion in 'The Projects Forum' started by simoncwk, May 20, 2008.

  1. simoncwk

    Thread Starter New Member

    May 20, 2008
    9
    0
    I have a project which need to build a IR remote control to control the lighting system at home. The remote control are able to to switch on and off the light and can control the light intensity. Anyone has any suggestion for me about how this project going to be start? The hardest parts for me in this project is the MCU, how a MCU can control the light intensity by just using 2 switches?
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63

    You can use an MCU with a built in DAC or an MCU plus an external DAC. With the one button you will increase its analogue voltage and with the other decrease it. You will use this analogue voltage to control the bulbs illumination intensity.
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    If this is going to be successful, you will have to decide on the devices that will be used to control lamp intensity at each point, plus the type of control inputs they need to function.

    The big problem is going to be retrofitting this stuff into an existing home and adding the wiring for the control lines. Then you will need to decide where the control station receiver/s will be located, and how they will communicate with the controller.

    This is a non-trivial task. After you have the hardware specs in hand for the above stuff, you can start to think about the controller.
     
  4. simoncwk

    Thread Starter New Member

    May 20, 2008
    9
    0
    DAC = Digital Analogue Converter? Which MCU has this function? Can you give me an example? How about PIC MCU or Zilog Z8 MCU? It is any possibility to do the coding?
     
  5. mik3

    Senior Member

    Feb 4, 2008
    4,846
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    I dont know about Zilog MCU's but almost (if not all) the PIC MCU have ADC. A few examples are PIC16F819, PIC18F4520, PIC16F877A and more other PIC's.

    You can visit microchips website www.microchip.com and find the one which suits best for your needs.

    ''It is any possibility to do the coding?'' what do you mean?

    Oups!!! you asked about DAC not ADC!!! Well i dont know but i will search and tell you
     
  6. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Ok one PIC with DAC is the dsPIC33FJ128GP802. Search on this family of PIC's (dsPIC33FXXXXX) and you will find more.
     
  7. simoncwk

    Thread Starter New Member

    May 20, 2008
    9
    0
    Thank you for your help.
    Basically i am a newbie for a PIC MCU, currently try to start from the beginning.
     
  8. simoncwk

    Thread Starter New Member

    May 20, 2008
    9
    0
    Can anyone give me some idea for going to start this project at the first? The major porblem i wil be facing is to control the light intensity using the remote control.
     
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