This past Tuesday, we completed the circuit assembly that converts the digital position signals sourced from our Arduino into dual analog voltages (+/- 5V) from the drawing pictured top middle to the 3x5 inch perf-board. These analog voltages are then fed into the galvanometer controller board, consequently driving the mirror's position steps required for creating the beam fan. On the bottom right the finished circuit board is pictured. The included components (from left to right) are as follows: 3-wire cable harness connection to galvo controller board, Arduino signal interface 4-pin Euro connector, two op-amps (in black/blue) with paired trimpots, 3-pin Euro connector for +/- 15VDC power rails, MCP4725 Digital-to-Analog Convertor (DAC). On the botoom right a view of the underside of the circuit board showing the connections made in between components of the board.