modified 5 years ago

Capacitors and resistances

00:43:35

What is the relationship between the resistance and the capacitor in these circuits? 
How low can you go?
How much power is consumed in each?
Is one more efficient than the other ?

published 5 years ago

PrathikP

5 years ago

What is this trend of setting the mains frequency to 60KHz instead of 60Hz, I will never understand. The North American mains frequency is sixty Hertz (60Hz), which is very different from sixty Kilo-Hertz (60KHz). And the amplitude input is the peak value that the sine wave reaches, which is Vrms*1.4142. 120V is the RMS or the equivalent DC voltage, and the amplitude is the peak voltage, which is equal to 120*1.4142 = 170V.

PrathikP

5 years ago

As for the appropriate dropper circuit, use a series combination of capacitor and resistor. The resistance helps limit the inrush current of the capacitor and saves the LED and the capacitor take care of the actual current limiting.

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