#include <TimerOne.h>
void setup() {
pinMode(9, OUTPUT); // Set pin 9 as an output
Timer1.initialize(50); // Initialize Timer1 with a 50 us period (20 kHz)
Timer1.pwm(9, 512); // Set PWM duty cycle to 50% on pin 9
}
void loop() {
// Do nothing, the signal is generated by Timer1
}
In this code, we use the Timer1 library to initialize Timer1 with a 50 us period (20 kHz) and set the PWM duty cycle to 50% on pin 9.
Note that both of these approaches require some knowledge of the Arduino's internal timers and PWM capabilities. Also, make sure to use a suitable resistor and capacitor to filter the signal if you're using it to drive a load, as the Arduino's output is not suitable for driving high-current loads directly.
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