The Not-So Ugly Duckling
This project is a laser harp built in the silhouette of a swan, using phototransistors and motion detection to trigger audio in real time. Designed as an experimental instrument merging natural aesthetics and circuitry.
Process
The first step of this process was doing research to discover the most efficient way of making this. Through this process I discovered which lasers and transistors would work the best together to provide the outcome I desired. From there the next step was designing the structure in which this could be housed and functional. I came up with the idea for a swan so that it would have plenty of room for string while still being a natural form.
These were the first two prototypes, made out of laser cut cardboard. They were made to test if the best proportions for playing the “strings” when they were built into the shape of the swan and cut from the size of acrylic I was using.
The next step was creating a 3D model using the measurements of the acrylic pieces, lasers, phototransistors, breadboard, and Arduino Uno to make sure everything would fit properly and function as intended.
Once the model was finalized, I laser-cut the two swan side panels along with the cross supports that hold the lasers and phototransistors. From there, I began the initial wiring to determine exactly what the electronics would require.
I then tested the lasers and sensors to understand their readings, which allowed me to write the code that would power the entire project. This included detecting when a sensor was blocked and triggering a corresponding audio track from the SD card.
Next I finished wiring everything inside of the frame.
And cleaned it up.
Next, I attached the other side of the swan. Using these clamps, I supported the frame while the glue set to ensure it would be able to stand up on its own and to make sure both sides became fully and securely attached.
The back side includes this door that allows access to the breadboard and Arduino so that changes can be made after the enclosure is built out.
A googly eye was added for character.
<- A video of the final product working!