Bit-Tree Creativity - Laser Harp Course Package

Laser Harp Course Package

Have you ever seen a harp without strings? This kit uses laser beams to simulate 8 harp strings. When your finger blocks one laser beam, the speaker will play sound at the corresponding frequency, and each laser beam corresponds to a unique tone. Learners will acquire knowledge of optics and music theory. By programming different codes, you can realize automatic music playback. It is interesting and engaging. Hands-on assembly is moderately challenging.

Block laser beams to trigger musical notes

Programmable to set automatic music playback

Learn optics and music theory; easy programming, moderately difficult assembly

BIT-TREE CREATIVITY

STEAM skills like programming will be a core competency for the next generation, and the time to cultivate this ability is now.

Level 1 Category	Level 2 Item	Parameter Description
I. Basic Product Information	Full Product Name	Laser Harp Course Package (Stringless, Beam-sensing Programmable Music Maker Kit)
	Manufacturer	BIT-TREE CREATIVITY (Integrated Supplier of Science Education Kits & Courses)
	Overall Dimensions	L 530mm × W 382mm × H 80mm
	Product Positioning	STEAM interdisciplinary teaching kit (Optics + Music Theory + Programming). Suitable for maker classrooms, tech clubs and innovation competitions in primary & secondary schools. Unified mainboard system within the brand series.
	Power Supply Specification	Standard DC5V power supply. Supports three power modes: USB cable, 5V power adapter, power bank.
	Main Structure	Assembled acrylic & wooden bracket, upper-lower split structure. Laser transmitter modules installed on the top; corresponding photosensitive receiver modules at the bottom.
II. Hardware Configuration Parameters	Laser Sound Strings	Standard 8 independent laser transmitter modules forming 8 virtual laser strings. One laser beam corresponds to one fixed musical note.
	Sensing Acquisition Module	8-channel photosensitive sensors (photoresistor / photoelectric receiver), one-to-one matched with each laser path. Beam blocking triggers signal variation.
	Audio Module	Built-in amplified speaker module. The mainboard outputs square waves of different frequencies to generate corresponding note sounds; supports external speaker expansion.
	Mainboard Compatibility	Compatible with BIT.U1 (ATmega328P, Arduino architecture) and BIT.S3 (ESP32) official boards. Shares hardware & programming system with password lock, smart trash can, traffic light and triangle piano kits.
	Reserved Expansion Pins	Spare IO pins reserved for external functional buttons and LED indicators; supports extended functions including melody switching and tone selection.
III. Product Function Parameters	Manual Playing Mode	Block a single laser beam → photosensitive receiver loses light → mainboard detects signal → speaker outputs corresponding note. 8 beams correspond to 8 basic notes for impromptu performance.
	Auto Playback Function	Modify built-in music coding to realize unattended cyclic playback of preset complete tracks.
	Expandable Programmable Functions	Customize pitch of 8 notes, switch multiple instrument tones, add beat indicator lighting and segmented loop playback.
	Subject Feature	No physical strings. Sound is generated via light blocking principle for intuitive learning of photosensitive sensing theory.
IV. Assembly & Programming Parameters	Assembly Difficulty	Relatively high hardware assembly difficulty. Precise alignment of upper & lower laser and sensor positions is required. Cultivate spatial assembly and circuit wiring skills; step-by-step assembly drawings included.
	Programming Difficulty	Low coding difficulty, beginner-friendly sample codes.
	Development Environment	1. Graphical Programming: Mixly block coding 2. Code Programming: Arduino IDE C Language (Universal development environment for all series)
	Programming Knowledge Points	1. Science: Optical principles, photoelectric characteristics of photosensitive components 2. Music Theory: Basic numbered musical notation, mapping between note frequency & pitch 3. Programming: Analog pin AD sampling, conditional judgment, array music storage, PWM audio frequency output, loop playback algorithm
V. Courses & Supporting Resources	Training Objectives	Optics popular science, music theory learning, circuit wiring/soldering, embedded programming, music programming creation, spatial structure building ability
	Supporting Materials	Official assembly manual, circuit schematic, two sets of sample source codes (manual playing base program + auto-play program) and teaching plans
	Application Scenarios	Optical experiments for science classes, integrated programming & music teaching, campus tech exhibition, student STEM DIY projects

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