Item Description
Features：
Laser harp, which plays a melody by simply fluctuating the string beam.
Once assembled, you can switch between high, medium and low tones with the push of a button to play two stored pieces of music.
it also has the protection of a transparent casing which not only looks beautiful but protects the internal components from external damage.
it is a nice creative little production for those who like DIY.
It is a fun electronic soldering kit, perfect for electronics enthusiasts and beginners to learn soldering skills and abilities.
Laser harp, which plays a melody by simply fluctuating the string beam.
Once assembled, you can switch between high, medium and low tones with the push of a button to play two stored pieces of music.
it also has the protection of a transparent casing which not only looks beautiful but protects the internal components from external damage.
it is a nice creative little production for those who like DIY.
It is a fun electronic soldering kit, perfect for electronics enthusiasts and beginners to learn soldering skills and abilities.
Product parameters.
Supply voltage: DC voltage 5V
PCB board size: 98.6mm*40mm
Supply voltage: DC voltage 5V
PCB board size: 98.6mm*40mm
Description:
1、There are 7 strings, when cutting the strings the horn emits the corresponding scale
2、The LED of the corresponding string lights up when the string is cut
3、Switch between high and low tones by key
4、Play the two stored music (happy birthday, only good mother in the world) through the keys
1、There are 7 strings, when cutting the strings the horn emits the corresponding scale
2、The LED of the corresponding string lights up when the string is cut
3、Switch between high and low tones by key
4、Play the two stored music (happy birthday, only good mother in the world) through the keys
Note: The PCB board is printed with various component logos, so pay attention to the direction of the logos on the PCB board when welding.
Working principle:
Laser harp, just fluctuate the string beam, you can play a melody
The stronger the light, the smaller the group value, and the darker the light, the larger the group value. When the laser beam shines on the photoresistor, at this time the photoresistor group value is very small, the microcontroller recognizes this voltage as a low level, does not issue a tone when blocking a certain value of the laser harp strings, the photoresistor received resistance light becomes dark, the group value becomes large microcontroller recognizes this voltage as a high level, through the transistor drive the speaker to issue the corresponding tone and light the corresponding LED, subject to the beautiful melodic combination of sound and light.
Laser harp, just fluctuate the string beam, you can play a melody
The stronger the light, the smaller the group value, and the darker the light, the larger the group value. When the laser beam shines on the photoresistor, at this time the photoresistor group value is very small, the microcontroller recognizes this voltage as a low level, does not issue a tone when blocking a certain value of the laser harp strings, the photoresistor received resistance light becomes dark, the group value becomes large microcontroller recognizes this voltage as a high level, through the transistor drive the speaker to issue the corresponding tone and light the corresponding LED, subject to the beautiful melodic combination of sound and light.
Component list:
Laser head: 7 pieces
10UF/electrolytic capacitor: 1pc
5516 photoresistor: 7 pcs
Crystal oscillator: 1pc
Resistor 10K: 9
Ceramic chip capacitor: 2
Resistor 1K：10pcs
Red and black parallel line: 1
LED transparent white hair blue: 10pcs
Black heat shrink tube: 1pc
DC-005 power socket: 1pc
Power charging cable: 1pc
Small speaker speaker: 1
Double-sided adhesive tape sponge: 1
Self-locking switch: 1pc
PCB board: 2
8 * 8 switch cap (red): 1
Shell package (2 pieces): 1pc
S8550 triode: 1pc
M3*5mm round head screws: several
6*6*16 four-legged keys: 2
M3*8+5mm single pass copper column: 5
40P IC chip holder: 1pc
M3*10mm double pass copper column:5pcs
STC89C52 microcontroller: 1
Laser head: 7 pieces
10UF/electrolytic capacitor: 1pc
5516 photoresistor: 7 pcs
Crystal oscillator: 1pc
Resistor 10K: 9
Ceramic chip capacitor: 2
Resistor 1K：10pcs
Red and black parallel line: 1
LED transparent white hair blue: 10pcs
Black heat shrink tube: 1pc
DC-005 power socket: 1pc
Power charging cable: 1pc
Small speaker speaker: 1
Double-sided adhesive tape sponge: 1
Self-locking switch: 1pc
PCB board: 2
8 * 8 switch cap (red): 1
Shell package (2 pieces): 1pc
S8550 triode: 1pc
M3*5mm round head screws: several
6*6*16 four-legged keys: 2
M3*8+5mm single pass copper column: 5
40P IC chip holder: 1pc
M3*10mm double pass copper column:5pcs
STC89C52 microcontroller: 1
Package Include:(Optional)
1 * electronic piano kit loose parts (without shell)
1 * electronic piano kit loose parts (with transparent shell)
1 * electronic piano kit loose parts (without shell)
1 * electronic piano kit loose parts (with transparent shell)
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