Closed luxarts closed 6 years ago
Yes, but high voltage capacitor more expensive than resistors.
i agree with @ok1hra, the power consumption is 150 mW and replacing the resistors with a capacitor to save a little just dont justify the more expensive capacitor
Hello!
I was suprised when I saw the 8 resistors at the AC input. Why not a capacitor? I don't think the phase shift between voltage and current matters. The total resistance it's 88k. In my country the frequency of the AC it's 50Hz. Doing the math:
Xc = 1/(2 π freq c) -> c= 1/(2 π freq Xc)
To get 88k: 1/(2 π 50 * 88k) = 36.17nF aprox. The close comercial value it's 39nF, getting 81.6k aprox.
Less power disipation, less heat, less footprint.
Regards, Lucas