Schematic Power Amplifier and Layout

This circuit functions with inaudible (ultrasonic) sound. Frequency to 20 kHz sound was heard by humans. The sound frequencies above 20 kHz is called ultrasonic sound. Described a series of produce (emit) ultrasonic sound frequencies between 40 and 50 kHz. Like the remote control system is also cirucit consists of a mini transmitter and receiver […]

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