Abstract: The present utility model relates to a toy device that generates sound effects and visual effects simultaneously. The device is composed of a melody/sound generator, the speaker of which is enclosed in a transparent shield with a few particles within it. When the diaphragm of the speaker vibrates it hits the particles and makes them bouncing up and down within the transparent shield, thus creating a brilliant visual effects as well.

Abstract: An electronic guitar music simulation system which includes a guitar shaped keyboard having multiple key switches corresponding to various musical notes. A control processor within the guitar shaped keyboard is utilized to detect each change in a key switch state and infrared transmitter then transmits a unique code corresponding to the change in state for each key switch. A battery powered infrared receiver unit receives each unique code and couples binary codes to the processor of a personal computer system, via an electrical connection to a parallel port of the computer system. A software module within the computer system then converts the binary code into a corresponding audio output signal which may be output via the computer system speaker. A power control circuit within the infrared receiver unit activates the infrared receiver unit only in response to a selected control signal from the computer system, preventing false activation of the infrared receiver unit.