The use of Arduino for studies in engineering applications and automation is quite common. The present paper reports the use of Arduino UNO R3 board for the Fourier analysis of various periodic waveforms. This is a very useful and cost effective idea for explaining and understanding Fourier series analysis. A real time Fourier component analysis of some standard input signals, such as square waves, sine waves, triangular waves and periodic pulses have been carried out in terms of the fundamental frequency and its harmonics. These results have been found to be the same as expected from the standard theoretical analysis. This method can be utilized effectively to teach the frequency components of a periodic waveform and demonstrate the utility of Fourier analysis to the students in the online mode of education, especially in remote places and villages.