ECE 4760: Final Project

Bioelectrical Body Fat Analyzer

Samir Borle (

Peter Li (

Demo Video

Introduction    top

" A bioelectrical impedance based body fat scanner."

-Project Sound Bite

Fig.1 The finished circuit

For our final project, we have decided to use the microcontroller provided to make a device which would measure body fat percentage of one's body. The basic principle behind this project is known as bioelectrical impedance analysis. This technique uses a small alternating current flowing between two electrodes attached to skin surface to determine impedance. By determining the opposition to the electric current through body tissues, we can estimate the water content of the human body and use it to estimate fat-free body mass. The IV response characteristics of these tissues can provide a good estimation of percentage body fat.