Bench Power Supply

thingiverse

I designed and printed a case for a benchtop power supply following this project: https://dronebotworkshop.com/simple-supply/ I designed mine to have 3.3 and 5.0 volt outputs from two buck converters, and a variable output from a DROK NC Regulator. Common ground jack for all outputs. Cost of purchased components is about $70. I used an old laptop power brick that I had in my workshop. If you don't have one of those, you'll have to buy one. Be sure that you have a jack that is compatible with the power brick you have; some jacks are hard to find. Total print time is about 8 hours. Post printing cleanup, assembly, soldering, and testing is about 6 hours. Print Setup: Prusa MK3S Printer Main Case: 0.6 mm nozzle, 0.20 layer height, PLA, painted "snug" supports on DROK opening, side openings, test leader holder, front panel marking cutout, and fan switch cutout. Top: 0.6 mm nozzle, 0.20 layer height, PLA, painted "snug" support for jack cutout. Output Marking Block: 0.40 nozzle, 0.10 layer height, PLA. Filament change at 1.80mm layer height to get contrasting color. Ironing enabled for all top surfaces so it looks nice. Foot: Print 4 of these and attach with 3mmm socket head cap screws. I used FilaFlex40 material which is a soft elastomer with a 0.6 mm nozzle, retractions turned off, and reduced feed roller pressure. Here are the purchased components I used. DROK NC Regulator: https://www.amazon.com/dp/B01FNVESV2?psc=1&ref=ppx_yo2ov_dt_b_product_details Buck Converters: https://www.amazon.com/dp/B06XRN7NFQ?psc=1&ref=ppx_yo2ov_dt_b_product_details Cooling Fan: https://www.amazon.com/dp/B08HXZYQKJ?psc=1&ref=ppx_yo2ov_dt_b_product_details Banana Plug Sockets: https://www.amazon.com/dp/B0863FYBWW?psc=1&ref=ppx_yo2ov_dt_b_product_details Test Leads: https://www.amazon.com/dp/B077PXL8TT?psc=1&ref=ppx_yo2ov_dt_b_product_details Rocker Switch: https://www.amazon.com/yueton-Pack-250V-Rocker-Switch/dp/B018FHB0H6/ref=dp_prsubs_sccl_2/147-2147087-5277255?pd_rd_w=bST8B&content-id=amzn1.sym.2c74594d-9264-4cdf-bf3d-e4e41e237275&pf_rd_p=2c74594d-9264-4cdf-bf3d-e4e41e237275&pf_rd_r=VARCCG45BFKQRJA00CRX&pd_rd_wg=MfA8E&pd_rd_r=67675692-a8d5-491b-b4f0-540f7356624e&pd_rd_i=B018FHB0H6&psc=1 DC Power Jack: https://www.amazon.com/gp/product/B01N8VV78D/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Assembly tip: Install the DROK NC Regulator LAST to maintain access to the interior for installing fan, buck converters, and attaching wires to banana plug sockets. Attach the wires to the DROK regulator using the removable plug, then install the DROK, and then press the plug into its socket on the DROK.