Watch a demo video ». Our goal was to build a brain-computer interface using an AVR microcontroller. We decided that the least invasive way of measuring brain waves would be using electroencephalography EEG to record microvolt-range potential differences across locations on the user's scalp. In order to accomplish this, we constructed a two-stage amplification and filtering circuit.
Electro-encephalo-graphy is the recording of the electrical activity along the scalp. EEG measures the fluctuations in voltage resulting from ionic current flows within the neurons of the brain. This project was based on the idea; when a person utters a lie, he undergoes several physiological signals like heart rate, skin conductance and brain signals.
Abstract Braincomputer interface BCI is an equipment and programming correspondences framework that allows brain signal alone to control computers or outside gadgets. A braincomputer interface BCI , or a brainmachine interface BMI , is a direct correspondence pathway between the Brain and an outside gadget. The prompt objective of BCI examination is to give correspondences abilities to seriously incapacitated. Brain-computer interface has attracted much attention recently, triggered by new scientific progress in understanding brain function and by impressive applications.