@▷ Ultrasonic Dog Repeller Circuit | Diagram for Schematic

Ultrasonic Dog Repeller Circuit

This ultrasonic dog repeller circuit will chase away angry dogs. It is build with the all known 555 circuit, a buzzer and a little ferrite transformator. The ultrasonic frequency must be set with a dog near by.

Dog repeller circuit diagram no 1

ultrasonic dog repeller circuit schematic number 1

Circuit number 1 uses the well known NE555 IC, couple of components and a EE15 ferrite transformer. Adjust R3 at resonance frequency of the piezo transducer for maximum aplitude of the repeller ultrasonic sound. At 30 KHz this can reach a value of 108 Vpp. Without the piezo the output voltage is around 200 Vpp.

Dog repeller circuit diagram no 2

ultrasonic dog repeller circuit number 2