Lamp for MatrixBrute Synthesizer

thingiverse

This was a personal project, not necessarily a fully realized community project, but I wanted to share it in case someone wanted to use it as is, or build off of it. I designed a custom lamp for the Arturia MatrixBrute synthesizer that uses an LED strip. It slips on the top of the synthesizer and hugs the sides, and can be removed by lifting it off. It's made with two plastic side pieces, and a piece of EMT conduit from the hardware store. The plastic sides hold onto the conduit with a tubular expansion wedge (Wedge Expander, by danmar) that spreads apart against the inside of the conduit as you tighten the screw in the end. The part that requires interpretation is how to secure the LED strips to the conduit. Originally, I wanted to stick the strip directly to the pipe but the light shines out the side into your eyes. I also doubted the strip would stay stuck to a curved surface long term. Here are some ideas for fixing these problems: 1) This is what I did: 3D printed an extra plastic extrusion to make a light shield and a flat spot for the strip, and glued that to the conduit. 2) Put the lights inside the conduit on a piece of wood or something, and drill holes to let the light out. Or machine a slot in the conduit to let the light out while leaving the ends intact. 3) Just put the LED strip directly on the conduit, and paint the edge of the strip with black paint. 4) Redesign the side pieces to take a U-shaped aluminum extrusion. The light strip goes at the bottom of the U, wedges are redesigned to be square shaped and expand against the sides of the U. Instructions: Once you've figured out how to get your LED strip on the pipe, you'll need the following parts from an American hardware store: * 3/4" EMT conduit, cut to 32.0625" * 2x screws, 1/4" dia., 2" long * 2x 1/4" nuts * LED strip light * 12" wire for the LED strip * Power supply for the LED strip * Controller for the LED strip if you want to do colors or dimming. I used one of these: https://www.amazon.com/gp/product/B00KAFF488/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 * Connectors for the LED strip to controller if needed * Contact cement Print the left and right side pieces without supports. Print 2x tubular expansion nuts with the slanted edge down on the bed. If you decide to go with a glue-on printed light shield, there are two versions: the long version is in two pieces, each 15" long, and the short version is four pieces about 7.5" long. There's an overhanging feature on the side pieces, and manual supports for that in the file. Check your slicer preview to make sure these will print correctly - it should be one perimeter thick with one layer space between the support and the overhang. Remove the supports with a hobby saw or little chisel-shaped hobby knife. Glue the pieces together using your preferred glue material, I used the conduit as a splint to hold them in place. Glue the light shield on the conduit with contact cement. Sand and paint the pieces if you like (high-build primer/filler primer from the auto parts store works great on prints). Solder or use a crimp connector to attach 12" of wire to the LED strip. Glue the LED strip to the light shield, I used contact cement applied to the light shield rather than trusting the adhesive of the strip. Stick the nuts in the tubular wedge expanders, and put the screws through the plastic piece into the wedge expander. Fish the wires through the left side plastic piece if you want to use the channel, solder or crimp a connector on the wires to connect power or controller to your LED strip. Slip the conduit into the left plastic piece, orient the light like you want it. Tighten the screw to expand the wedge in the tube and hold it tight. Slip the right side on but don't tighten it all the way. Put the assembly on the matrixbrute, get the spacing right then tighten the right side.