Definition

Frequency is the number of complete cycles per second in alternating current direction. The standard unit of frequency is the hertz, abbreviated Hz.

Frequency Measurement

                Frequency Measurement is carried out by measuring the number of cycles in one second, this method requires time of one second. Other method is to measure time period of one cycle F = 1 / T.

In this example time from first rise to the second rise is measured using interrupt on Pin 2 (INT0). It is set to detect rising pulse and at every 100mSec measured frequency is displayed on serial monitor. Continue reading Frequency Measurement using Arduino →