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Best cheap MCU for LED project

Discussion in 'General Electronics Discussion' started by jason3w, Nov 14, 2013.

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  1. jason3w

    jason3w

    4
    0
    Dec 7, 2012
    Hey Guys,
    Just looking for some advice on the best MCU to use in a simple LED project.
    The unit is powered by 3 x LR44 and with cycle through 4 modes.
    Flashing RGB
    Flashing RB
    Flashing BG
    Slow fading between RGB
    and Press and hold to turn off.

    Using a single 5mm RGB LED.

    The main thing is price as we are going to make lots of these :)
    Like 10000 units to start with.

    So the price is a pretty large consideration. So thinking lowest cost for the functions required.

    Any tips would be excellent.

    Thanks heaps
    Jason
     
  2. BobK

    BobK

    7,682
    1,687
    Jan 5, 2010
    I know only PIC microcontrollers, so I can give you info only about them, there may be others that are cheaper.

    So you need 1 input and 3 outputs. A 6 pin PIC could do the job. Partly it depends on how good a programmer you are.

    The PIC10F series are 6 pin PICS and range from $0.31 o $0.39 volume pricing.

    I think I could cram the entire code into even the smallest one, PIC10F200 but it would be a challenge with 256 instructions and 16 bytes of RAM. The higher end ones have better instruction set and 512 instruction memory and 64 bytes of RAM. I am certain I could code it for that one.

    If I were you, I would attempt to code it and see which one is needed.

    Bob
     
  3. jason3w

    jason3w

    4
    0
    Dec 7, 2012
    Hey Bob,
    Thanks for the quick reply. I think it's a good idea to write the software to see which size we need. Thanks for the good advice! :)
    Jason
     
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