Electrical – Polypropylene capacitor power supply

power supplytransformerless

I found some articles talking about transformerless power supplies, and I have uploaded the schematic of such a circuit. Does anybody have an idea about the pros and cons of such a power supply? Also how to calculate the value of this capacitor "C1" ?

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Best Answer

I've seen these done thusly


simulate this circuit – Schematic created using CircuitLab