The question is answered: Alexander Myasoedov
Who said that is unacceptable? Can. But:- In this case, the galvanic isolation of the device, which is powered by low voltage from the mains, is not ensured. This means that if the choke, resistor or damping capacitor breaks through, then the full mains voltage will go to the device.
- Also when disconnecting an electrical receiver from a resistor, inductor or capacitor, that is, when they will be without load, the output of such a "step-down power supply" will also have a full voltage networks.
- These methods do not lower the voltage, but limit the current, as a result, the voltage across the load decreases. But this is not at all like the undervoltage on the secondary winding of the transformer.
That is, it is unsafe for both the user and the power receiver itself. When powered by a step-down transformer, there is no danger of electric shock.
Please clarify in what context (for what purpose) and what are you going to feed in this way? If carrying at 12-36 volts, then the whole point of using extra-low voltage is lost.
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