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Arduino 9V Battery To 5V


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Arduino 9V Battery To 5V. From the uno and mega documentation pages: A digital high voltage > 5v can be reduced using a resistor voltage divider.

Mastering Arduino
Mastering Arduino from subscription.packtpub.com

The board can operate on an external supply of 6 to 20 volts. If supplied with less than 7v, however, the 5v pin may supply less than five volts and the board may be unstable. I'm making an led chaser, so there will be led only.

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Mastering Arduino

I'm familiar with the 7805. A digital high voltage > 5v can be reduced using a resistor voltage divider. Often, the question that arises in such projects is about powering the arduino itself. The board can operate on an external supply of 6 to 20 volts.

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