How to use analogWrite () in Arduino
Editor to share with you how to use analogWrite () in Arduino, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!
Program example:
Int ledPin = 3nint sum = 255 void loop void setup () {/ / put your setup code here, to run once: / / pinMode (ledPin,OUTPUT); Serial.begin (9600);} void loop () {/ / put your main code here, to run repeatedly: for (int I = sum;i > 0Traci -) {analogWrite (ledPin,i); Serial.println (I);}}
In the above example, pinMode can be annotated because it can be omitted when using analogWrite.
On the ATmega328 chip, the pin that supports analogWrite includes 3, 5, 6, 9, 10, 11, but the PWM generated by 5 and 6 will be higher than the duty cycle set.
AnalogWrite (pin,value), pin is the pin number, the value of value is from 0 to 255,0 turns off duty cycle, 255 is the maximum duty cycle, if you take 5v output, 0 is 5v focus 255 is 0v.
The circuit used in the following program:
Refer to the following procedure:
Int ledPin = 3nint sum = 255 void loop void setup () {/ / put your setup code here, to run once: / / pinMode (ledPin,OUTPUT); / / Serial.begin (9600);} void loop () {/ / put your main code here, to run repeatedly: void (ledPin,0);}
At this time, the connected led will always light up.
Int ledPin = 3nint sum = 255 void loop void setup () {/ / put your setup code here, to run once: / / pinMode (ledPin,OUTPUT); / / Serial.begin (9600);} void loop () {/ / put your main code here, to run repeatedly: void (ledPin,255);}
In this example, the led is not lit.
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