High Current Buck Converter case with fan

thingiverse

I fitted a neopixel LED ring to illuminate my printing and offer some useful functionality. However, the original buck converter seemed to be getting quite hot despite low power consumption, so I thought I'd upgrade the 5-volt supply for the LEDs. This case has countersunk mounting holes in the base and will fit on most surfaces. It mounts on 2020 extrusion on my Kossel Linear Plus. The case has a fan and a labyrinth air path design that draws air positively across the heat sinks. It's designed to use a 30mm 5-volt fan, which provides decent airflow with minimal noise. In use, the heatsinks are barely warm even after prolonged prints of 18 hours or more with the Neopixel ring running at full speed in white color. The case is designed to have an option where the fan takes its power from pogo pins mounted in the lid. This removes the need to disconnect the fan wires when removing the cover for maintenance. The adjuster knob shaft can be covered with a cap to prevent accidental movement. A case design with a threaded hole for the cap is optional, as is the lid with pogo pin holes if you prefer to power the fan from other sources. I put holes in each end so a 12-volt fan could be used, or they can be used to access the terminal screws without removing the lid. I hope someone finds this useful. There are many buck converter cases available, but I thought I'd share my design since I couldn't find one for this particular circuit board. Here's a parts list: Buck Converter: WINGONEER XL4016E1 DC 4-40V to DC 1.25-36V 8A Buck Converter - https://www.amazon.co.uk/gp/product/B071L34ZXB/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1 Pogo Pins: 13mm long, 2.5mm diameter with 3.5mm shoulder (Optional) - https://www.ebay.co.uk/c/900472179 Fan: 30mm 5-volt "Pi-Fan" - https://www.amazon.co.uk/gp/product/B071JN6HKM/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1 You'll also need four M3 x 30mm cap head screws and four M3 x 8mm mushroom or cap head screws to secure the fan. I have a selection of fasteners, so you can source these from anywhere.