By cutting the solder mask layer into a business card with the laser cutter, it can be held on top of a PCB and then used as a stencil to add the solder paste more easily than could otherwise be done.

The result is a 3D model that is like a solder paste mask combined with a raised border to match the board outline, so that the whole thing self-aligns by fitting on top of the PCB. A handy ...

The mask is assembled with separate panels that ... Soldering the LEDs to the panels was accomplished using solder paste and a $20 toaster over. The LEDs, of which there are thousands, are ...