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Набор для сборки лазерной арфы 7 струн C51 MCU — описание:DIY The user only needs to move the beam as if the string is moved, and a melody can be played. The laser harp is composed of two parts: a photosensitive resistor and a single chip microcomputer STC89C52. When the beam emitted by a laser tube is blocked, the corresponding photosensitive resistance is induced and the resistance changes are generated. The system of eight photosensitive resistors produces the change of high and low potential, and reads the high and low potential changes of the photosensitive resistance by the single chip computer, and completes the input of the operation instruction. The MCU controls data based on command information to transmit data through serial port, which is assigned to p0^2 port of loudspeaker and P1 port of water lamp to generate corresponding response.
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