Abstract: A musical wind chime especially to one which generates music according to the appearance of the wind chime includes a wind chime body and a sound control circuit. A power source is used to supply the required electrical power to the sound control circuit. A wind control switch connected between the power source and the sound control circuit for responding to any wind to intermittently connect the power source to the sound control circuit and generating music therefrom. The wind control switch includes a circular conductor formed inside the wind chime body, a conductive rod hung therein but not contact with the circular conductor, and a conductive ball attached to the conductive rod such that when some wind occurs it causes the conductive ball to swing and contact with the circular conductor. A wind plate is suspended under the conductive ball for receiving wind force thereby driving the conductive ball to contact with the circular conductor.

Abstract: A light string controlling apparatus includes a bridge rectifier, an RC filter, an signal generator, and a silicon controlled rectifier. The signal generator provides the gate of the silicon controlled rectifier a train of pulses or analog signals or a combination of pulses and analog signals, to control the conducting angle of the silicon controlled rectifier, affecting the flashing frequency and illumination of a light string.