Re: if frequency of electric is 50 Hz, how many time flash l
Hi there,
you are alsking absolutly right, I was wrong, a a 50 hz contain 50 ful sine waves, so its 100 peaks,
regarding the led, well most of the circuits that contains a led indicator connected directly on 220v suply is simply a very heigh resistor and an led in series, it will work only in the positive period, actuall,y, it depends on how u r connecting the led ! , if you put it in parallel of a dc power supply with a resistor in series, then it will never blink
byeeeeeee