Another DIY Bench Power Supply

thingiverse

Update: Commenter pointed out that I overlooked the current rating on the buck converters I linked, we should be using something like the XL4015, I updated the **DIYBench_Bottom** file with a XL4015 variant. 07/08/2020. This is yet another DIY bench power supply designed to be printed with minimal supports, roomy enough to work in comfortably, and for the final product to be nice and strong. All components used have been linked below. The supply relies on m3 bolts tapped into plastic; I recommend getting an m3 tap if you're going to build this, you can also use bolts to tap the plastic but a tap would be easier. The box goes together with 15 or 16 5mm m3 bolts (a 16mm bolt can go in place over the step down converter as a set screw if tolerance is loose), the fan requires 20mm or 25mm m3 bolts and nuts, and the fused mains plug requires a couple bolts (15mm or 20mm will do) and nuts. The side walls of the box all slot together; when printing, there's one area on each wall that requires support. I've modeled a support structure that needs to be aligned with its corresponding wall (you can adjust its Z scale to get the right offset from the parts, depending on your printer). The front panel also needs support under the XT60 connector housing. Note: The bottom plate has a 'front', you should see a small notch in the lip around that bottom part, allowing for clearance for the XT60 connector's housing. Note2: The XT60 and USB port may need a dab of super glue to secure them in place. Note3: I'm no electronics expert so I won't be providing a wiring diagram. If you're going to attempt this project, there are plenty of resources or similar DIY supply schematics available. Be careful with mains power when wiring up your switch; it can kill! I also included a link for a pre-wired version. Features: * 36v 5A power supply mounting points * 2 small buck converter mounting points * 80mm or 92mm x 10mm cooling fan mounts * Fused power switch mount point * Rocker switch mount point (for fan power) * XT60 female jack mount point * USB female jack mount point Components used: * Power Supply - https://amzn.to/3f2cySq * Banana Plug Jacks - https://amzn.to/3h5L2oR * Step Down Converter - https://amzn.to/2YcSea8 * Buck Converters (UPDATED) - https://www.amazon.com/Organizer-Lithium-Battery-Converter-Constant/dp/B07V7F5K8T/ * 80mm Fan - https://amzn.to/3dLzLbl * 92mm Fan - https://amzn.to/30mF5Ot * Fused Power Switch - https://amzn.to/2MG176L * Fused Power Switch (Pre-Wired!) - https://amzn.to/3f3xc4z * Rocker Switch - https://amzn.to/2YeIKv8 * XT60 Connector - https://amzn.to/2Ur80x1 * USB Port - https://amzn.to/2AgcfVm * 20mm Rubber Feet - https://amzn.to/37l2Wja * 3MM Thread Tap - https://amzn.to/2YmasGu Shout out to my buddy Alan who inspired this project!