This tutorial will discuss making a counter using a loop in Arduino. Make a Counter in Arduino Counters are used to count a process, like the number of times a button is pressed. A counter can also carry out an operation a specific number of times. We can use a loop to make a counter in Arduino. For example, if we want an LED to blink 10 times, we can use a for or a while loop to turn an LED ON and OFF multiple times.