Pete Vree | Arduino Tutorial #6 (digitalRead and Serial Monitor) @PeteVree | Uploaded 6 years ago | Updated 2 days ago
In this video we will use a push button to send a 5V dc signal into the Arduino. Using the digitalRead instruction we will then send the 0 or 5 V dc signal to be read by the Serial Monitor as either a 0 for Low, or a 1 for High.

https://www.arduino.cc/en/Reference/DigitalRead

https://www.arduino.cc/en/Reference/AnalogRead
https://www.arduino.cc/en/Tutorial/ReadAnalogVoltage