2022-04-04 14:40:51 -04:00
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## PWM
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***Pulse Width Modulation*** / Modulación por ancho de pulso
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[Arduino.cc](https://docs.arduino.cc/learn/microcontrollers/analog-output)
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| Placa | Pines PWM | Frecuencia PWM |
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| - | - | - |
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| Uno, Nano, Mini | 3, 5, 6, 10, 11 | 490Hz (pines 5 y 6:980 Hz) |
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| Mega | 2 -13, 44-46 | 490Hz (pines 4 y 13:980 Hz) |
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| Micro | 3, 5, 6, 9, 10, 11, 13 | 490Hz (pines 3 y 11:980 Hz) |
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[Arduino.cc](https://www.arduino.cc/reference/en/language/functions/analog-io/analogwrite/)
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#### PWM pin 9
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```c
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#define LED 9
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void setup() {
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pinMode(LED, OUTPUT);
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}
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void loop() {
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for (byte i=20; i<255; i++) {
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analogWrite(LED, i);
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delay(5);
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}
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for (byte i=255; i>20; i--) {
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analogWrite(LED, i);
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delay(5);
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}
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}
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```
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