High Current Buck Converter case with fan
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3D model description
I fitted a neopixel LED ring to illuminate my printing and offer a bit of colour to the printer with some useful functionality. However, the original little buck converter seemed to be getting quite hot considering the lowish power being consumed so I thought I'd upgrade the 5 volt supply for the LED's.
This case has a pair of countersunk mounting holes in the base and will fit on pretty much any surface. It mounts on 2020 extrusion on my Kossel Linear Plus. The case has a fan and a labyrinth design air path which draws air positively across the face of the heat sinks. It is designed to use a 30mm 5 volt fan which provides decent amount of air movement with very little noise. So far in use, the heatsinks are barely warm even after prolonged prints of 18 hours or more with the Neopixel ring running flat out in white colour.
The case is designed to have an option where the fan takes its power from a pair of pogo pins mounted in the lid. This removes the requirement to disconnect the fan wires when removing the cover for maintenance. The adjuster knob shaft can be covered with a cap to prevent inadvertent movement. A case design with a threaded hole for the cap is optional, as is the lid with the pogo pin holes if you wish to power the fan from other sources. I put holes in each end so a 12 volt fan could be used too, or they can be used to gain access to the terminal screws without lid removal, if no pogo pins used.
Hope someone finds it useful. There's a plethora of these buck converter cases out there but I thought I'd chuck my design into the mix as I've not found one for this particular circuit board. Parts list below:
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
13mm long pogo pins, 2.5mm dia with 3.5mm shoulder. (Optional) https://www.ebay.co.uk/c/900472179
You will also need four x M3 x 30mm cap head screws and four x M3 x 8mm mushroom or cap head to secure the fan. I've got a selection of fasteners so you can source these from anywhere.
- 3D file format: STL
- Publication date: 2020/06/26 at 16:13
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