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• power supply - 230V to 12V step down transformer - Electrical Engineering Stack Exchange

power supply - 230V to 12V step down transformer - Electrical Engineering Stack Exchange

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I'm making a water level indicator using an 89C51 for which I need 5 V input voltage. I used a 230 V to 12 V step down transformer and a regulator to get 5 V. I got the 5 V but then the transformer

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