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LAYZOR!!! is a laser light show projector made with scrounged parts and designs and software from the Web.
This project started when Tom Gralewicz showed me a pair of X-Y galvanometers in his junk box. I decided I could make a laser light show projector with them, so I browsed around on the web and came across several designs based on hooking a USB sound card to a computer to generate the signals. Thus was LAYZOR!!! born.
LAYZOR!!! uses a USB 5.1-channel sound card as a DAC to generate signals to a set of galvanometers, which deflect the beam from a green laser pointer in X & Y to draw animations on a screen. The sound card generates a 2.4±1.2v signal, whereas the galvanometers expect a -10-10v input, so the signal has to be routed through a correction amp to offset it by -2.4v and amplify it by about 8x. The correction amp boards are based on this schematic, modified slightly to use the components we had on hand at MMS.