/*
Controls servo position from 0-180 degrees and back
https://wokwi.com/projects/351967394028061269
by dlloydev, December 2022.
This demonstrates using an inverted PWM output for servo control.
It allows using only one transistor to drive a higher voltage Servo control signal.
No additional latency added as the signal is inverted by the timer peripheral.
Choose/edit an attach function parameter to customize the signal configuration.
*/
#include <Servo.h>
Servo myservo = Servo();
const int servoPin = 5;
void setup() {
Serial.begin(115200);
myservo.attach(servoPin, true); // attach to first free channel, inverted pwm
//myservo.attach(servoPin, 3, true); // attach to channel 3, inverted pwm
//myservo.attach(servoPin, 6, 500, 2500, true); // attach to ch 6, minUs=500 maxUs=2500, inverted pwm
//myservo.printDebug();
}
void loop() {
for (int pos = 0; pos <= 180; pos++) {
myservo.write(servoPin, pos);
delay(15);
}
for (int pos = 180; pos >= 0; pos--) {
myservo.write(servoPin, pos);
delay(15);
}
}
Representing
NPN transistor