Circuit Diagram of Auto Switch-Off Power Supply

Circuit Diagram of Auto Switch-Off Power Supply

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Circuit Diagram of Auto Switch-Off Power Supply

Though in the prototype a transformer with a secondary voltage of 12V-0V, 250mA was used, it can nevertheless be changed as per user?s requirement (up to 30V maximum. and 1-ampere current rating). For drawing more than 300mA current, the regulator IC must be fitted with a small heat sink over a mica insulator. When the transformer?s secondary voltage increases beyond 12 volts (RMS), potentiometer VR1 must be redimensioned. Also, the relay voltage rating should be redetermined.

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1 Title: Circuit Diagram of Auto Switch-Off Power Supply
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3 Upload date: April 15, 2018
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