safety - How much current can I draw from the Arduino's pins? - Electrical Engineering Stack Exchange
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How to Power Your Arduino? Vin, 5V, and 3.3V Pins. - Circuit Journal
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Can I use the 5V (VIN) pin as output, if it is already connected to a battery? : r/arduino
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![Arduino UNO Pinout Complete Guide [With Diagram]](https://deepbluembedded.com/wp-content/uploads/2023/04/Arduino-UNO-Pinout-Diagram-Guide.jpg "Arduino UNO Pinout Complete Guide [With Diagram]")
Arduino UNO Pinout Complete Guide [With Diagram]
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Arduino Uno Rev3 — Arduino Online Shop
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2.1.0-Arduino Uno board front view and explanation of pins. See... | Download Scientific Diagram
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