DIY Laser Harp Electronic Welding Kit 51 Single Chip Computer Electronic Organ Electronic Production Kit Parts

Description Product parameters Product Name Laser Electronic HarpSupply voltage DC voltage 5VBoard size 91 63mmFinished product size 91 63 55mmFinished product weight about 200gProduct description The laser harp is a harp without strings Instead it is replaced by a bright beam Users only need to pluck the light beam as if plucking the strings they can still play a melody and they also have built in music for playback and listening The circuit consists of two parts photoresistor and STC89C52 When the light beam emitted by the laser tube is blocked the corresponding photoresistor senses and produces resistance changes A system composed of 7 photoresistors produces high and low potential changes and the single chip microcomputer reads the high and low potential changes of the photoresistor to complete the input of operating instructions The single chip microcomputer controls the data to transmit data through the serial port according to the instruction information and assigns values to the data port connected to the speaker and the water lamp to make it react accordingly When there is laser irradiation the microcontroller reads the voltage of the photoresistor and it is at low level at this time When there is no laser irradiation the single chip microcomputer reads the voltage of the photoresistor then it is high at this time In this way when the light of the laser is blocked a switch effect can be produced in the circuit The human ear can hear the so