void loop() is a function that runs again and again in a cycle. Here we are just sending a HIGH signal to the pin9 of the Arduino board. void loop() { digitalWrite(buzzPin,HIGH); // Sending a HIGH ...

void setup() is a function in which we initialize the pins of the Arduino board to be used as INPUT or OUTPUT. Trigger pin will be used as output and an echo pin will be used as input. We have used ...

Programming Arduino UNO for multitasking will only require the logic behind how millis() work which is explained above. It is recommended to practice blink LED using millis again and again to make the ...

Functions make the whole sketch smaller and more compact because sections of code are reused many times. They make it easier to reuse code in other programs by making it more modular, and as a nice ...

RFID Door Lock System using Arduino Circuit Diagram. ... The 12V solenoid lock is connected through a relay module to our Arduino UNO board. The set-up is powered buy a 12V lithium battery pack making ...

Here the “analogWrite” function can be used to set the PWM duty cycle. To regulate the brightness level of an LED with PWM, just connect it to one of the PWM channels (with a 1K resistor in series) ...