Capacitive dropper VS resistive circuits

106

01:07:50

What's the differences?

published 5 years ago

yankozz

5 years ago

Is the only difference the heat generated from the reaistor? Doesn't the capacitor heat as well?

stanislav_maslovski

5 years ago

the capacitor (ideally) does not heat up from the passing ac. However, the wires that deliver the current do. When you use a capacitor to drop extra voltage, besides the active power consumed by the load, there is a reactive (oscillating) power in the circuit. This oscillating power can, for instance, still overload the network in terms of the maximum current, or result in extra heat generated in the wires, etc. It is alway better to use a transformer.

yankozz

5 years ago

Thanks for the explanation. In another words, both circuits are bad idea. I just wondered why so much cheap Chinese lights and low power electronics are using this type of circuits (well obviously because they're cheap 😂).

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