51 SCM Laser Harp Electronic Organ Piano The Music Box Puzzle Technology DIY Kit

51 SCM Laser Harp Electronic Organ Piano The Music Box Puzzle Technology DIY Kit

:5V
Features:
-High bass switch.
-Play the stored two songs by pressing the button.
-When the string corresponding to the LED string lit,a total of 7 LED.
-A total of seven strings,the string when the buzzer cut the corresponding sound level.
-The laser harp is a harp without strings, and instead of a bright beam of light, the user can just pluck the beam and play a melody.
-When there is a laser beam, the microcomputer reads the voltage of the photosensitive resistor, which is low level. When there is no laser irradiation, the microcomputer reads the voltage of the photosensitive resistor, then it is high level. Thus, when shielding the laser light, can produce the effect of the switch in the circuit.
-The audible frequency of the human ear is 20Hz to 20kHz, and the frequency of harp notes should be in this range. Its just that different notes have their own fixed frequencies. The audio can be generated by the 16-bit that comes with the 52 single .
-The photosensitive resistor and the single microcomputer STC89C52 are composed of two parts. The launch of the beam laser tube is blocked, the corresponding photosensitive resistance induction and generate resistance changes, eight photosensitive resistance of the change of the system to produce high and low voltage, and low potential changes by microcontroller reads the photosensitive resistance, complete instructions input, single microcomputer control data according to the instruction information through the serial port to transmit data, both docking speaker p0 ^ 2 mouth and running water light p1 mouth to carry on the assignment, make its produce the corresponding reaction.

Notes:
1. Manual measuring, please allow 1 ~ 3mm error,thank you.
2. Due to the difference between different monitors, the picture may not reflect the actual of the item. We guarantee the style is the same in the picture.








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