Digitally filtered ECG signal using low-cost microcontroller

This paper demonstrates the ability of designing a low-cost, flexible and modular health-care device to sense the Electrocardiography (ECG) signal of the heart. The design is made of two sensing electrodes, analog amplifiers and a low-cost microcontroller. Digital low-pass, notch and band-pass filters were implemented because they are less expensive than analog filters. Up on its low power consumption, low cost and high performance, an Atmega32 microcontroller was used to implement all required digital filters.