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. It is designed to be printed with minimal supports, be roomy enough to work in comfortably, and for the final product to be nice and strong. All the components I used have been linked below. The supply was designed to rely on m3 bolts tapped into the plastic, I'd recommend getting an m3 tap if you're going to build this, you can also use the 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 is one area on each wall that requires support, I've modeled a support structure that will need 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). Also the front panel needs support under the XT60 connector housing. Note: The bottom plate does have a 'front', you should be able to see a small notch in the lip around that bottom part, that allows 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, though if you're going to attempt this project there are a lot 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. The gist is it goes from switch to power supply, then step down converter to power outputs (banana jacks, etc). You can also divert some of the DC power to a buck convert to your fan directly or through the a rocker switch. 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!