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5V analog to 230V max

Discussion in 'General Electronics Discussion' started by patr0805, May 12, 2010.

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  1. patr0805


    Apr 26, 2010
    Okay I would like to hear if anyone knows how to transform 5V max to 230V max so that my arduino device can control the strength of some 230V lights using its analog port.
  2. Laplace


    Apr 4, 2010
    The solution is simple in concept, but more tricky in practice to interconnect 5V DC logic to 230V AC power circuits. You will need a power triac thyristor to control the intensity of the lamps. You will need a zero-crossing detector to establish the phase timing of the 230V AC. Just read the phase timing signal on one of the arduino inputs, generate a variable countdown time delay, then generate an output signal to trigger the triac. Googling the words {microcontroller triac} will return numerous application notes on how to design the interface circuitry.

    Check out the MOC3012 opto-isolator with triac trigger output. Looks like it could make the interface problem rather simple.
    Last edited: May 13, 2010
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