An EEG Generator Capable of Reconstructing Signals from Any EDF File and Simulating Human Body EEG Collection Environment

In Electroencephalogram(EEG)-related research, it's common to require EEG signals for testing, often collected directly from the human body. This paper introduces a low-cost MCU-based EEG signal generator that can be used for early validation testing of EEG-related circuits and systems. The generator reads data through PC software or a TF card and generates waveforms using the MCU's DAC ports, allowing for the faithful reproduction of signals from any EDF/BDF file. The amplitude of the generated signals matches real EEG amplitudes. We have designed standard calibration signals with frequency and amplitude errors of less than 1%. The results show that our design produces signals with excellent resolution and real-time capability, accurately simulating EEG signals collected from the human body, meeting the requirements for most teaching and testing scenarios.