vakits 5mm LED Cross Enclosure

thingiverse

I picked up a couple of blank LED cross PCBs at a Hamfest a few years ago with plans to install them in my truck as assisted brake lights, but being sluggish... that never happened. Fast-forward to 2017 and I have a shiny new 3D printer... aka a brand-new toy. What a perfect time to do something with these crosses. The cross is designed so the PCB fits snugly down into it and a thin backplate snaps on top of it. When powered up, the LEDs are clearly visible through the thin front layer. You can get the PCB kit for this directly from the company here - http://vakits.com/led-crucifix-5mm Print Settings Printer: Tevo Tarantula Rafts: No Supports: No Resolution: 0.1 Infill: 60% Notes: This needs to be printed with specific settings to be printed correctly: Layer Height: 0.1mm Wall Thickness: 0.5mm Wall Line Count: 1 Top Thickness: 0.8mm Top Layers: 8 Bottom Thickness: 0.8mm Bottom Layers: 8 Infill: 60% Post-Printing After assembly, you can either solder the wires directly to the board or, if you're feeling bold, make the cross removable like I did. The metal strips are aluminum duct tape - as used for heating/AC duct work, not the kind used for wallets. The wires are attached to the tape strips using two-part conductive epoxy. This way, turning off the LEDs is simple: just pull the cross out of the base. The LEDs on this board are wired in series. Power requirements and current dropping resistor(s) depend on the LEDs you use. My LEDs are 3.2-3.8v, 30mA continuous blue LEDs. To power this from a standard USB port, I have two 100Ω 1/4 watt resistors connected in series (to get 50Ω at 1/2 watt to handle the current needed by 12 LEDs each pulling .03 amps) with the positive lead of the USB connector.