Make the laser harp of the intention by oneself

Description: The laser harp allows visitors to interact by stretching out their hands across its surface, producing sound without physical strings. The concept was inspired by an Iranian exhibit at the World Expo 2010 in Shanghai. The construction of the laser harp is straightforward, using five 3.0V laser tubes mounted on a wooden block, with photoresistors installed to detect interruptions in the laser beams. The project involves connecting a battery box and wiring according to a power schematic, with two types of microcontrollers, AT89C2051 and ATMEGA8, used for the circuit design. Due to material limitations, only a five-string version was created, utilizing DIP components and insulated wiring.

The laser harp operates by utilizing laser beams to create an interactive musical experience. When a hand crosses the path of the laser beams, the interruption is detected by photoresistors, which then trigger sound output through a connected microcontroller. This project highlights the simplicity and effectiveness of using basic electronic components to create a musical instrument that does not require traditional strings.

The assembly process involves several key steps. First, five 3.0V laser tubes are securely mounted on a wooden block, which serves as the main body of the harp. Hot-melt adhesive is recommended for securing the lasers and ensuring stability. Each laser beam must be aligned carefully so that they form a grid, allowing for multiple interaction points.

Next, 0.8mm holes are drilled into the wooden block to accommodate five photoresistors. These components are essential for detecting when a laser beam is interrupted. Each photoresistor is connected to the microcontroller, which processes the signals and generates the corresponding musical notes.

The power supply is managed through a battery box, which should be placed conveniently within the assembly for easy access and replacement. Wiring connections must be made according to a detailed power schematic to ensure proper functionality. The microcontroller serves as the brain of the operation, interpreting the signals from the photoresistors and controlling the output to speakers or sound modules.

Two microcontroller options, AT89C2051 and ATMEGA8, offer flexibility in terms of processing capabilities and features. The choice between these can affect the overall performance and sound quality of the harp. The project demonstrates the use of readily available electronic components, allowing for a DIY approach that encourages creativity and experimentation.

Overall, this laser harp project exemplifies how technology can transform traditional musical instruments into innovative, interactive experiences, making it an engaging endeavor for electronics enthusiasts and musicians alike.So long as the visitor stretches out one`s hand and crosses the black harp of that entire body, the tone will be played . Why is not there the string to play S He says, this is the laser harp. This laser harp lets me recall a lot of old affairs of many years` standing too, I have ever said to classmates for a long time, I can make a laser harp too, still and his bet, but because the question of time has never been finished. Has seen the laser harp of the Iranian hall, I decide to produce it, it is certainly a very simple and crude laser harp.

But to friend and speech fond of DIY, it is a good intention that is made small. Install 5 3. 0V laser tubes on the wood block above, and fix on wood block below with the hot-melt adhesive. Bore the hole with the bit of 0. 8mm, and install correspondent 5 pieces of photo resistance, namely make up the fundamental base. Then, put cell box No. 5 in the appropriate place, fix with the hot-melt adhesive. Finally, according to the power schematic diagram, connect the correspondent lead wire with the socket, in order to facilitate the staging of back-end connected sum. Finally, connect with circuit board base again. I successively made two kinds of circuit of the base, the ones that adopted were these two one-chip computers of AT89C2051 and ATMEGA8 separately.

Certainly, characteristic and result are different. Because the material is limited, I have only made the works of 5 strings. It is very simple for this making to weld, are all the components and parts of DIP, use the insulating mantle line according to the schematic diagram, connect and correspond to the pin. There is a harp without string in the Iranian hall of World Expo 2010 Shanghai, that is the most interesting exhibit in the numerous visitor`s generally acknowledged Iranian halls!

So long as the visitor stretches out one`s hand and crosses the black harp of that entire body, the tone will be  played . Why is not there the string to play Staff members have announced the secret for us- He pressed the musical instrument on one`s body  The light  Key set, 14 red laser beams penetrate from the top of the musical instrument.

He says, this is the laser harp. This laser harp lets me recall a lot of old affairs of many years` standing too, has ever said to classmates for a long time, I can make a laser harp too, still and his bet, but because the question of time has never been finished. Has seen the laser harp of the Iranian hall, I decide to produce it, it is certainly a very simple and crude laser harp.

But to friend and speech fond of DIY, it is a good intention that is made small. Install 5 3. 0V laser tubes on the wood block above, and fix on wood block below with the hot-melt adhesive. Bore the hole with the bit of 0. 8mm, and install correspondent 5 pieces of photo resistance, namely make up the fundamental base. Then, put cell box No. 5 in the appropriate place, fix with the hot-melt adhesive. Finally, according to the power schematic diagram, connect the correspondent lead wire with the socket, in order to facilitate the staging of back-end connected sum. Finally, connect with circuit board base again. I successively made two kinds of circuit of the base, the ones that adopted were these two one-chip computers of AT89C2051 and ATMEGA8 separately.

Certainly, characteristic and result are different. Because the material is limited, I have only made the works of 5 strings. It is very simple for this making to weld, are all the components and parts of DIP, use the insulating mantle line according to the s