An Arduino experiment to determine the gravitational acceleration using a light interruption apparatus with PLX − DAQ data acquisition tool

In this paper the author is presenting a novel experiment for measuring the gravitational acceleration using simple and cost effective apparatus with a regular pendulum, composed of an Arduino Uno and a light interruption circuit with an light dependent resistor (LDR) and an light emitting diode (LED), the data was recorded using PLX − DAQ data acquisition tool for further analysis, the experiment would be useful for introductory physics courses on the subject.