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Is it possible to generate 2 square pulses using arduino uno?
Okay, that sounds simple enough. Can you give me an example code for generating two square pulses?
Sure, here's an example code snippet that generates two square pulses on digital pins 9 and 10 with a frequency of 1 kHz:

void setup() {
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
}

void loop() {
  digitalWrite(9, HIGH);                    
  digitalWrite(10, LOW);                    
  delayMicroseconds(500);             
  digitalWrite(9, LOW);                     
  digitalWrite(10, HIGH);                    
  delayMicroseconds(500);
  digitalWrite(10, LOW);                     
}