Product Principle:

The laser harp uses laser beams directed at photodiodes to convert light signals into electrical signals. When the user touches the laser beam, it is similar to plucking a harp string, causing the corresponding photodiode’s voltage level to change. The microcontroller controls data transmission through the serial port based on command information, allowing the speaker to still play beautiful melodies.

Gameplay Points:

First, steadily rotate the generator crank handle until the voltage stabilizes. Then use your finger to touch the laser beam, and you will hear the corresponding music. Next, press the pitch change button to switch between low, mid, and high pitches. You can also press the auto-play button to automatically play songs.