How powerful is the output from Arduino Nano?

Here is a demonstration of the actual voltages in the Arduino Nano board being checked. Current drain from D13 pin when the external LED is connected is also being checked. It shows the variation in on and off states of the LED as expected during the functioning of the blinking LED sketch in Arduino Nano. Change in current between 330 ohms and 220 ohms voltage drop resistors are also shown. Read More: https://johnsonfrancis.org/techworld/how-powerful-is-the-output-from-arduino-nano/

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