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I am making a circuit with Arduino. It is known that the recommended power supply of an Arduino is 7V - 12V. I am going to use a 9-0-9 (230V to 9V) transformer, convert the stepped down voltage to DC, and feed it into the Arduino through the Vin pin.
Now, there are chances that the input AC may considerably rise over 230V, thereby increasing the output voltage. I was thinking of using a voltage regulator to keep the voltage stabilised at 8V to 9V or lower. I have two options:
An Arduino has an internal voltage regulator. But I read that they tend to heat up very soon. So, I don't want my board to be destroyed by overvoltage. I want to control the voltage outside the Arduino, coupled with a heat sink.
Which among the two components should be better? How do they differ in their working? If you prefer the voltage regulator and not the diode, how should I connect it in my circuit?
N.B.: I calculated that the minimum voltage of my circuit would be about 6V under extreme conditions, and even if the Arduino shuts down at that voltage, I have no problem.
Now, there are chances that the input AC may considerably rise over 230V, thereby increasing the output voltage. I was thinking of using a voltage regulator to keep the voltage stabilised at 8V to 9V or lower. I have two options:
An Arduino has an internal voltage regulator. But I read that they tend to heat up very soon. So, I don't want my board to be destroyed by overvoltage. I want to control the voltage outside the Arduino, coupled with a heat sink.
Which among the two components should be better? How do they differ in their working? If you prefer the voltage regulator and not the diode, how should I connect it in my circuit?
N.B.: I calculated that the minimum voltage of my circuit would be about 6V under extreme conditions, and even if the Arduino shuts down at that voltage, I have no problem.