Which type of pin is used for reading varying voltage levels on Arduino?

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Multiple Choice

Which type of pin is used for reading varying voltage levels on Arduino?

Analog input pins are designed to sense a continuous range of voltages. They feed the signal into the Arduino’s ADC (analog-to-digital converter), which converts the varying voltage into a digital value your code can use. This lets you read precise changes from sensors, pots, or other voltage sources, not just on/off states. Digital pins only detect binary states (high or low). PWM pins appear to produce a variable voltage by rapidly switching on and off, but they’re still digital at the pin level; the varying effect is achieved through pulse width and often requires filtering to resemble a true analog level. Serial is a communication method, not for reading voltage levels. So for reading varying voltage levels, you use the analog input.

Analog input pins are designed to sense a continuous range of voltages. They feed the signal into the Arduino’s ADC (analog-to-digital converter), which converts the varying voltage into a digital value your code can use. This lets you read precise changes from sensors, pots, or other voltage sources, not just on/off states.

Digital pins only detect binary states (high or low). PWM pins appear to produce a variable voltage by rapidly switching on and off, but they’re still digital at the pin level; the varying effect is achieved through pulse width and often requires filtering to resemble a true analog level. Serial is a communication method, not for reading voltage levels. So for reading varying voltage levels, you use the analog input.

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