Live Demonstration: Portable Stimulation System for Transcutaneous Auricular Vagus Nerve Stimulation

An electrical stimulation system on board for transcutaneous vagus nerve stimulation (tVNS) treatment is proposed. The proposed system is designed to exert the current stimulation in the monophasic and bi-phasic waveform. The frequency of stimulation is from 0.1 Hz to 750 Hz with a 0.1 Hz scale. The current amplitude ranges from 0 mA to 19 mA with a $5 \mu \mathrm{~A}$ scale (on a $1 \mathrm{~K} \boldsymbol{\Omega}$ with $1-\mathrm{ms}$ stimulations). The duration is from $50 \mu$ s to $5000 \mu$ s with a $10 \mu$ s scale. The system can be controlled wirelessly through Bluetooth by the user interface developed on a smart device.