Enabling Transcranial Electrical Stimulation via STI01: Experimental Simulations and Hardware Circuit Implementation

This paper presents the novel utilization of a chip, STI01, developed in China and traditionally used for muscle stimulation, to meet the demands of transcranial electrical stimulation (tES). We present the principles behind the design of the external circuit's filter, along with the simulation results. Notably, we successfully accomplished tES utilizing the STI01 chip. This design could be enhanced further by enriching the MCU (STM32F030) program and introducing a closed-loop Brain-Computer Interface (BCI). Given the compact nature of the circuit design, it has potential for integration as a core circuit in portable wearable devices.