videos in AudioSet
A list of about a million ten-second YouTube clips, each labelled with the sounds in it, that Google published in 2017. Labs use it to train and test general audio and music models.
Including Sine Wave Inverter (SMPS) Voltage PID Controller using PIC, Pure Sine Wave Inverter PIC16F876A Under Heavy Load Testing, 3-Phase Variable Frequency Sine Wave Drive via PIC16F876A