Interactive Laser Harp

Overview This project consists of a laser harp, an interactive musical instrument that generates sound when a user interrupts visible laser beams with their hand. Each laser beam corresponds to a musical note. When the beam is blocked, the system detects the change and activates a tone through a built-in speaker. The device is built on a curved wooden and plastic frame with multiple red laser diodes aligned with photodetectors (photodiodes). An Arduino microcontroller continuously reads each sensor and triggers a specific tone based on which beam was interrupted. A rotary selector allows the user to switch between rhythm or tone modes.