12 Volts Transformerless Power Supply

Published:2012/9/26 21:24:00 Author:muriel | Keyword: 12 Volts, Transformerless, Power Supply | From:SeekIC

This 12 Volts transformerless power supply take advantage of the fact that a Zener diode is also a normal diode that conducts current in the forward direction. During one half wave, the current ?ows via D1 through the load and back via D4, while during the other half wave it ?ows via D3 and D2. Bear in mind that with this circuit (and with the bridge rectifier version), the zero voltage reference of the DC voltage is not directly connected to the neutral line of the 230-V circuit. Transformerless Supply Circuit Schematic



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