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Enjoy Electronic design? Enjoy 3D printing? Enjoy music? Ok, no problem. Let's make a simple project, and enjoy all of them.

We made this as way to demo a few things you can do with our apps, 123D Circuits and 123D Design : Design circuits. Simulate the circuits online. 3D Model online and prepare for 3D Printing.

Interesting, right? You can make one too. Keep reading for the links.

Special thanks to Ally Zhao and Betty Zhuang for her 3D printing technical support and appearance design support .


Laser Harp from Wind on Vimeo.

Step 1: The Online Simulation

You should see an embedded viewer of the virtual breadboard from the 123D Circuit Project. It should look similar to the image above.

If you need help we have this getting started instructable.

Once you're in the viewer you can scroll around and zoom in and out. If you want to start the simulation or make changes you first need to make this circuit your own.


Step 2: List Parts

We need 7 laser transmitters and Photoresistor(LDR) modules (Most important part. Of course, you could use more to get better effect.).

Also we need 1 Arduino UNO (could be any Arduino), 1 piezo and some wires.

Step 3: Laser Cutting for the Acrylic Frame

Created SVG curves as above image.

Then, laser cutting along the curves to make the frame using Acrylic board.

There are two side frames and one bottom board, the side frames can insert into the rectangle ports make the frame can stand on the desk.

In the side frame, there are 7 rectangle ports which used for arranging the laser transmitters. The 3 holes are used for fixing the distance between the Acrylic frames with sleeve holds the bolt.

Step 4: Design and 3D Printing the Circuit Boxes

All the models are designed in 123D Design Desktop, printed with printers Spark supported, like Makerbot Replicator 2, Dremel etc.

We followed the 3 principles to modeling:

1. Created accurate models to make the electronic components were just enough in them.

2. In order to reduce the printing time, we cut the spare parts which do not affect the structure of the case. (e.g. Laser transmitter carrier)

3. As far as possible don't use glue to stick them together. Like Photoresistor(LDR) module box, we separated the large model into several parts, and design the simple mortise and tenon joint structure. Printed out separately then joined them together don’t use any glue.

  • Laser transmitter carrier:

The laser transmitter can insert into the hole in the middle of the carrier to fix its position. Both end need to insert into the rectangle ports in Acrylic frames.

  • Photoresistor(LDR) module box:

The second image shows the result of the box view from top viewer. The Photoresistor(LDR) module appear in the small hole, and there are no any wires exposed outside. Arduino boards are placed on the right side box.

The third image shows the result of the box view from bottom viewer. All the wires and electronic components are hidden in the box.

Step 5: Finish and Enjoy

Final step, assembling all parts, enjoys your own laser harp.

This project just to demo how to make some interesting things with 123D CIrcuits. The Arduino UNO is not good at playing music, so the sound of 0a laser harp is not the same like real harp.

Also you could change the code and use a button instead of the laser transmitter and LDR.

Hope everyone could enjoy 123D circuits.

<p>This is a really cool project. Probably really fun to play with! :)</p>

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