6 LEDs without transformer, need help...

Discussion in 'General Electronics Chat' started by Fire.Snake, Aug 21, 2010.

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  1. Fire.Snake

    Thread Starter New Member

    Aug 15, 2010
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    Hi guys,

    I received this schematic from my friend, but there's no further explaination. I'm a newbie to electronic stuff, so I need help about this one. So far, I built it 'n everything just fine, although I know from this forum that it's dangerous to light up LEDs directly to main power grid without transformer.

    What is the function of RC parallel in the blue box? And what is the formula to calculate their value?

    Thanks... :)
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    The circuit is simply too dangerous to use. Use a wall transformer to power the LED's.

    We do not discuss line powered circuits.
     
    Fire.Snake likes this.
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