This is the case that will package all of my laser harp components. The board rests on an inner ledge and is what will enclose the wiring. The galvo mirror, laser source, and photo sensor(s) will be mounted on top of the board. I spray-painted the wood board black to make it match the case. 

Today I soldered the header pins to the sockets of the MCP4725 Digital to Analog Converter (DAC) board. This board will generate analog drive signals in the range of 0-5 VDC from digital signals sent to it over a I2C communication link from the microcontroller board. The drive signals will further be fed to a bipolar amplifier circuit, serving as the final set of signals controlling the position of the galvonometer mirror. As a reminder, the galvonometer mirror is what creates the fan of beams from the original single laser source.

Today, we tested our Arduino microcontroller to see how the user interface worked on the computer. I watched a tutorial that explained some of the basics to writing the necessary code for relating the inputs and outputs of your Arduino board. I wrote a simple code that turned one of the Arduino's embedded LEDs on and off. Easy, I know, but this was the first code I had ever written so it was exciting!

Galvanometer in from Holland as pictured above. (Item that laser source is pointing into)

Things we tested with the galvo:
- maximum deflection angle
- maximum fan anlge
- voltage necessary to achieve desired fan width
- possible approaches to create equally +/- voltage