D.R. Adhika*, Suprijanto⁺, Sobikin, A.R. Asnar, A.K. Afiyansah, and F.I. Muchtadi

Research Division of Instrumentation and Control – Faculty of Industrial Technology;

Bandung Institute of Technology; Jl. Ganesha 10, Bandung, 40132, Indonesia;

*damar133@students.itb.ac.id, ⁺supri@tf.itb.ac.id

Abstract

Brain Computer Interface (BCI) is a new system interface that using electrical signals from the brain (Electroencephalogram-EEG) as an input to control other devices. BCI is a promising technique to help people with severe motor disabilities to have effective control of devices such as computers, wheel chairs or assistive appliances. BCI system consist of many components such as electrode, bio-amplifier, an intelligent signal processing and control interface. The electrode that installed on the scalp of the head is used to sense the weak electrical signal from the brain for about 250 mV. As a part of BCI system, we require a portable bio-amplifier system. On the research, the prototype of a portable 2 channel EEG system based on an open source bio amplifier project will be developed and tested. Electrical signal from electrochemical activities of the brain is captured by electrode, transmitted through well-shielded cable to the circuit. The main part of circuit consists of three stages amplifiers and active filters to cancel out noise. After it passed the circuit, it entered the DAQ-Card that used to convert analogue signals to digital signals. When the signal is on digital form, it can be processed in computer. As a case study, EEG signals with or without stimulation was measured and analyzed based on frequency spectrum of the signal.

Keyword: Electroencephalogram, Brain Computer Interface, Electrode, Bio-amplifier

Paper lengkap dapat dibaca di tautan berikut  http://journal.engineering.or.id/joki