See page 264: http://www.atmel.com/Images/doc8161.pdfcnh1995 said:How do I change the clock prescaler for the ADC?
AnalogRead() is a function on the Arduino Uno that reads the analog voltage value from a specified pin. This allows the Arduino to read and interpret signals from analog sensors and devices.
AnalogRead() works by using the built-in analog-to-digital converter (ADC) on the Arduino Uno. The ADC takes in the analog voltage signal from a specified pin, converts it to a digital value, and then returns that value to the program for further processing.
The range of values that AnalogRead() can return is from 0 to 1023. This corresponds to a voltage range of 0 to 5 volts, as the ADC on the Arduino Uno has a resolution of 10 bits.
No, AnalogRead() can only be used with the analog input pins (A0-A5) on the Arduino Uno. Digital pins can only read digital signals (i.e. HIGH or LOW) and cannot read analog values.
The values returned by AnalogRead() can be stored in a variable and used in your program for various purposes, such as controlling the brightness of an LED or the position of a servo motor. These values can also be used for data logging or for making decisions based on sensor readings.