TJ-56-653 laser electronic piano electronics soldering diy kit

The laser electronic piano electronic welding diy kit, which uses the principle of laser emission and reception to simulate strings through laser simulation to control and change music. Using the characteristics of the photoresistor, we toggle the light beam, the corresponding LED light is on, and the middle, low, and high three tones can be adjusted through the buttons, and a melody can still be played. There are also several built-in music that can be played and listened to. The circuit consists of two parts: photoresistor and microcontroller STC89C52. The principle is very simple, easy to use, and can be applied to electronic teaching and entertainment.

Kit parameters:
Product Name: 51 MCU Laser Harp DIY Welding Kit
Product model: TJ-56-653
Working voltage: DC5V (DC power supply)
PCB size: 100*40mm/104*15mm

Product features:
1. There are 7 strings in total. When the strings are cut, the horn emits the corresponding scale.
2. When cutting the strings, the LED lights corresponding to the strings light up.
3. Switch between high, medium and low tones by pressing the button.
4. Two pieces of music are stored.

principle:
The circuit consists of two parts: photoresistor and microcontroller STC89C52. When the beam emitted by the laser tube is blocked, the corresponding photoresistor senses and produces a change in resistance. A system composed of eight photoresistors produces changes in high and low potentials, and the microcontroller reads the changes in high and low potentials in the photoresistors to complete the input of operating instructions. The microcontroller controls the data transmission through the serial port according to the instruction information, and assigns values to the data ports connected to the speaker and the water lamp to cause corresponding responses. When there is laser irradiation, the microcontroller reads the voltage of the photoresistor, which is low level at this time. When there is no laser irradiation, the microcontroller reads the voltage of the photoresistor, and it is high level at this time. In this way, when the laser light is blocked, a switching effect can be produced in the circuit.