analogWrite()
Writes an analog value (PWM wave) to a pin. Can be used to light a LED varying brightnesses or drive a motor at various speeds.
After a call to analogWrite(), the pin will generate a steady square wave of the specified duty cycle until the next call to analogWrite() (or a call to digitalRead() or digitalWrite() on the same pin)
Writes an analog value (PWM wave) to a pin. Can be used to light a LED varying brightnesses or drive a motor at various speeds.
After a call to analogWrite(), the pin will generate a steady square wave of the specified duty cycle until the next call to analogWrite()
PWM 1-4 works at 488 Hz. If you need faster operation, use zunoFastPWM() on A0.
Check Z-Uno pinout
By default Z-Uno2 works at 488 Hz for backward compatibilty. You can tweak carrier frequency youself in wide range using analogWriteFrequency.
analogWrite occupies TIMER1 hardware. You are able to use only 4 channels simylteniously.
analogWrite(pin, value)
pin
the pin to write to: PWM1, PWM2, PWM3 and PWM4
the pin to write to. You can use any pin for this functionality, but up to 4 channels simylteniously.
value
the duty cycle: between 0 (always off) and 255 (always on) (see analogWriteResolution() for more details)
the duty cycle: between 0 (always off) and 255 (always on) (see analogWriteResolution() for more details). Use 0 to release one of occupied PWM channels.
None
Sets the output to the LED proportional to the value read from the potentiometer.
int val = 0; // variable to store the read value
void setup() {
}
void loop() {
val = analogRead(A3); // read the input pin
analogWrite(PWM1, val / 4); // analogRead values go from 0 to 1023, analogWrite values from 0 to 255
}
analogWriteResolution()
analogWriteFrequency()
