Wisana, I.D.G.H. et al. 2025. Development of a Low-Cost and Efficient ECG devices with IIR Digital Filter Design . Indonesian Journal of Electronics, Electromedical Engineering, and Medical Informatics. 3, 1 (Aug. 2025), 21–28. DOI:https://doi.org/10.35882/ijeeemi.v3i1.194.