Astable multivibrator has no external triggering input, only monostable has it.
If you need to add a triggering input to start the astable vibrator. Use the below code, here once the trigger button is pressed the square wave starts to generates.
//Add code inside void loop
if ((digitalRead(trigger) == HIGH) || (state == 1)) {
//At the beginning Initialize variable state as 0.
state = 1;
digitalWrite(output, HIGH);
delay(Time);
digitalWrite(output, LOW);
}
An Astable Multivibrator has no stable states. It is a two state device which requires no external triggering. The output generates a square wave with a definite frequency. The Output alternates between HIGH and LOW state or two output voltage levels for a definite period of time. That is ON and OFF for a definite period. The oN time and OFF time can be different which determines the duty cycle of the oscillator. Duty cycle = ON time period / Total time period.
So using an arduino a simple switching of a digital output between a HIGH and LOW state with a time delay function can be used as an astable multivibrator. Inside the void loop, it just repeats and generates a square wave of definite frequency and duty cycle.
// HIGH for 100us and LOW for 100us. Repeats again.
while(1){
digitalWrite(output, HIGH);
delayMicroseconds(100); // pauses for 100 microseconds
digitalWrite(output, LOW);
delayMicroseconds(100); // pauses for 100 microseconds
}
Refer : Monostable multivibrator using arduino
Astable multivibrator has no external triggering input, only monostable has it.
If you need to add a triggering input to start the astable vibrator. Use the below code, here once the trigger button is pressed the square wave starts to generates.
//Add code inside void loop if ((digitalRead(trigger) == HIGH) || (state == 1)) { //At the beginning Initialize variable state as 0. state = 1; digitalWrite(output, HIGH); delay(Time); digitalWrite(output, LOW); }An Astable Multivibrator has no stable states. It is a two state device which requires no external triggering. The output generates a square wave with a definite frequency. The Output alternates between HIGH and LOW state or two output voltage levels for a definite period of time. That is ON and OFF for a definite period. The oN time and OFF time can be different which determines the duty cycle of the oscillator. Duty cycle = ON time period / Total time period.
So using an arduino a simple switching of a digital output between a HIGH and LOW state with a time delay function can be used as an astable multivibrator. Inside the void loop, it just repeats and generates a square wave of definite frequency and duty cycle.
// HIGH for 100us and LOW for 100us. Repeats again. while(1){ digitalWrite(output, HIGH); delayMicroseconds(100); // pauses for 100 microseconds digitalWrite(output, LOW); delayMicroseconds(100); // pauses for 100 microseconds }