Mastech MS2101 Digital AC/DC Clamp Meter (444) SMD Regulated output voltage of 3

Regulated output voltage of 3

or even the number of cycles that the Arduino is performing

Also check M5Stack ATOM Matrix

Two rows of holes for the pins (Male and Female)

Mastech MS2101 Digital AC/DC Clamp Meter (444) SMD Regulated output voltage of 3Mastech MS2101 Digital AC DC Clamp Meter Mastech MS2101 (Original) Digital AC DC Clamp Meter measures AC DC current and voltage, resistance, capacitance, frequency, temperature and duty cycle, tests continuity and diodes. The Mastech clamp meter is a handheld 3 1 2 digital meter for measuring DC and AC voltage, AC current, Resistance, Diode and Continuity Test with battery operated. Accuracy is specified for a period of one year after calibration and