AN-1140 Ultrasonic Pest Repeller using GreenPAK

This application note will describe the implementation of motion trigger-able Ultrasonic repeller. The design uses a SLG46140V GreenPAK4 CMIC. The input from a PIR (Passive Infra-Red) will be connected to a digital input pin and the output of an Oscillator will be from a digital output pin. The pulse input from the PIR will be delayed and the output from an Oscillator running at 2000kHz will be scaled down to 21kHz and 24kHz producing 2 alternating tones that are irritating to pests.

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