003 - Controlling LEDs in Arduino

Front

What is digitalWrite?

Back

digitalWrite is an Arduino function used to set the voltage level on a digital pin, controlling whether a pin outputs a HIGH (ON) or LOW (OFF) signal.

Front

What are the parameters of the digitalWrite function?

Back

digitalWrite(pin, value); where 'pin' is the pin number and 'value' can be HIGH or LOW.

Front

What does LOW represent in digitalWrite?

Back

LOW represents 0 volts or a logic level 0, turning the connected device OFF.

Front

What does HIGH represent in digitalWrite?

Back

HIGH represents the operating voltage of the Arduino board, usually 5 volts, turning the connected device ON.

Front

How does digitalWrite work for an LED?

Back

digitalWrite(pin, HIGH) supplies voltage to the LED, turning it ON; digitalWrite(pin, LOW) cuts off the voltage supply, turning the LED OFF.

Front

What is a practical example of using digitalWrite with an LED?

Back

Connecting an LED to pin 5: Writing HIGH to pin 5 sends 5V to the LED, causing it to light up; writing LOW stops the voltage, turning the LED off.

Front

What must be done before using digitalWrite on a pin?

Back

The pin must be set as OUTPUT using pinMode(pin, OUTPUT).

Front

What is the significance of using digitalWrite on INPUT pins?

Back

For pins configured as INPUT, digitalWrite can enable or disable internal pull-up resistors.

Front

What is the purpose of the lesson on controlling lights using Arduino?

Back

To learn how to control multiple lights using Arduino, simulating real-world scenarios.

Front

What is a real-world scenario where Arduino can control lights?

Back

Traffic Light System: Arduino manages the light timings and transitions automatically at intersections.