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Results tagged with pwm
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user 46
PWM is a form of signal modulation that allows digital output to approximate an analog signal. Use this for questions about using the PWM pins (marked with ~).
4
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Do I need to use a resistor if I am using a potentiometer to control an LED's brightness?
That value is then fed to a PWM analog output, through the analogWrite() call, that will output a square wave to the LED. … The relative position of the pot will determine the duty cycle of the PWM, i.e., how long the square wave is HIGH or LOW. …
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24
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Why do some pins have a different PWM frequency?
Those aren't the only frequencies available for the PWM signals. However, they are the frequencies as determined by the applied prescaler (which you can readily change as detailed below). … My sources:
http://playground.arduino.cc/Code/PwmFrequency
http://arduino.cc/en/Tutorial/SecretsOfArduinoPWM
http://arduino.cc/en/Tutorial/PWM
http://arduino-info.wikispaces.com/Arduino-PWM-Frequency …
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