An electrocardiogram is information of heart signals and activities of an individual measured by electrocardiography using an electrocardiograph machine. Machines tend to have malfunctions, failures, errors, damages, and misuse on usage. Medical equipment cannot be neglected to exist with such factors as it is concerned and connected to the lives of patients. There are several medical errors repetitively ruining several lives every year globally. Therefore, in this case, an ECG Simulator is used to perform calibration and testing over the instruments such as patient monitors and other electrical heart activity recording equipment periodically. To make this viable to every region, we need an economically convincing model. Models: We developed a simulator with basic electronic components for normal sinus rhythm signals generating over 60 and 120 beats per minute. We also developed another simulator that can be loaded with processed ECG arrhythmia signals essential to effectively test any instrument. Result: Both the models produced a promising output as per their configuration respectively.