Arduino Nano: PPT VOX

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Analog In

/*
    Detect A0
    Switch PTT D4
*/
int State;
int outPin=4;

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin 4 as an output.
  pinMode(outPin, OUTPUT);
  Serial.begin(9600);
}

// the loop function runs over and over again forever
void loop() {
  State=(analogRead(A0)+analogRead(A0)+analogRead(A0)+analogRead(A0))/4;
  // Serial.print(State);
  // Serial.print("\n");
  if( State<1000) digitalWrite(outPin, HIGH);
  else digitalWrite(outPin, LOW);
  delay(100);
}

Digital In

/*
  Rig PTT VOX
  Detect D4 dari Audio
  Output D5 ke Switch

  modified 2022 June 22
  by Onno W. Purbo
*/

boolean State=LOW;
int inPin=4;
int outPin=5; 

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin 5 as an output.
  pinMode(outPin, OUTPUT);
  pinMode(inPin, INPUT);
}

// the loop function runs over and over again forever
void loop() {
  State=digitalRead(inPin);
  digitalWrite(outPin, !State);
  delay(10);
}

Alternatif Lain

/*
  Rig PTT VOX
  Detect D4 dari Audio
  Output D3 ke Switch

  modified 2021 Dec 3
  by Onno W. Purbo
 */

int State=LOW;
int inPin=4;
int outPin=3; 

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin 3 as an output.
  pinMode(outPin, OUTPUT);
  pinMode(inPin, INPUT);
}

// the loop function runs over and over again forever
void loop() {
  State=digitalRead(inPin);
  if( State==1 )
     digitalWrite(outPin, LOW );
  else
     digitalWrite(outPin, HIGH );
  delay(10);
}