LASER HARP Circuit with STC-89C52 DIY KIT
Inspired by the famous LASER HARP this is for everyone!
► Buy Laser Harp: https://circuitpop.com/products/c51-l...
A Laser Harp is a harp without strings. It is replaced by a bright light beam. The user only needs to turn the light beam as if the strings were turned, and they can still play a melody. Photoresistor and IC STC89C52 are composed of two parts. When the beam emitted by the laser tube is blocked, the corresponding photoresistor senses and produces a change in resistance. The system of seven photoresistors produces a change in high and low potentials, and the IC reads the changes in high and low potentials of the photoresistor to complete the input of the operation command.
When there is laser irradiation, the STC reads the voltage of the photoresistor, at this time it is low level. When there is no laser irradiation, the STC reads the voltage of the photoresistor, then it is high level. In this way, when the light of the laser is blocked, a switching effect can be generated in the circuit.
The frequency of sound that can be heard by the human ear is 20Hz to 20kHz, and the frequency of harp notes should also be in this range. It's just that different notes have their own fixed frequency.
Features:
Auto Play
Laser Light
Power at 5V DC
21 Notes (7 gropup of 3)
Switch for High, Medium and Low sounds
Components:
1x STC89C52 IC
1x 40 Pin DIP
7x Laser Diode
7x Photoresistor
10x 1KΩ Resistors
9x 10KΩ Resistors
1x 12.000 MHz Quartz
2x 30 pF Ceramic Capacitors
1x 10uF Electrolytic Capacitor
2x Buttons
1x DC connector
1x Transistor S8550
Heat shrink tubing
3x Green LED 3mm
7x Red LED 3mm
1x Buzzer
1x Main PCB
3x PCB for structure
4x PIN (for USB)
USB to DC cable
Extra components are included with the KIT, like Resistors, LED and Pins.. I think they have been put as spare parts, I'm not sure.. they are still useful for other projects :)
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Chapters:
0:00 - Intro
0:49 - Unboxing
1:22 - Explanation
1:57 - Assembly
6:40 - TEST
9:07 - End
⚠WARNING Laser: Always use the necessary protections with LASER!!!
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WARNING: This video is only for demonstration. I don't take any responsibility.
#LASER #HARP #TUTORIAL