This creation has an ultrasonic mousetrap with irregular motion.It includes a mousetrap.There is a motor inside；One pedestal,The utility model is used for connecting with the shaft of the motor；And a control circuit,It is connected with the motor.The system includes a scrambling generating circuit and an amplifying circuit.Random code generation circuit can generate random values.The motor is driven by the amplifying circuit.Such a design,The motor shaft can be fixed on the base.Due to the irregular left and right rotation of the motor,Rotate the mouse repeller with motor to the left and right to increase the area of rat repellent.We randomly project the rat repellent ultrasound in different directions.There was a significant difference between a sudden loud noise and a quiet one.In order to drive away the mice.本創作具不規則運動之超音波驅鼠器，其係包括一驅鼠器，其內具有一馬達；一基座，其係用以與馬達的軸相連接；以及一控制電路，其係與馬達相連接，其係包含亂碼產生電路及放大電路，亂碼產生電路可隨機產生數值，並透過放大電路來驅動馬達作動；如此之設計，可以因馬達之軸固定於基座上，因馬達不規則之左右旋轉，令內含馬達之驅鼠器做相對的左右旋轉以增大驅鼠面積，將驅鼠的超音波隨機的投射到不同的方向，令老鼠有不預期之突然巨聲與安靜的明顯差異，以達到驅趕老鼠的目的。
