Mini Makita battery-based 80 Watt Power Supply

FreeCAD Source Included!!

Built on top of this battery dock:

https://www.amazon.com/dp/B086S47GZG

Buck Boost Converter:
https://www.amazon.com/gp/product/B0861LGM15

• NOTE: The heatsink doesn't have great contact with the MOSFETs on the board, order a small tube of thermal glue and apply it before assembly.  It will make the device run much cooler.

Toggle Switch:
https://www.amazon.com/gp/product/B07MFQ4TNK

Panel mount fuse holder (use no more than 4A fuse)
https://www.amazon.com/gp/product/B08JHM2DQY

Output Binding Post:
https://www.amazon.com/gp/product/B07PJY71MR

Assembly hardware:

4x M3 nuts
4x M3x14 socket head screws

You can "capture" the nuts into the bottom of the print with a screw.  Do this before assembly.

Notes on printing, infill:

This is a "one piece" and as such, the top is effectively a very large overhang.

I've gotten best results with manual supports

* Add support under "front lip" of meter cutout

* Add support under roof

* support KEEPOUT above the rear screw holes, otherwise the infill will fill the screw holes

* 5.5 mm pitch, snug support

See enclosed pictures showing infill and support painting

Notesd on Wiring:  

(All internal wiring is done with 16 AWG speaker wire)

Open up the adapter will need special bit

REMOVE (de-solder) the 14 guage wires at the plate.

Solder 16 AWG wires in their place.  Drill two holes as shown in the photog and feed them through

Battery Positive (red)

* makita-red -> switch (in), switch(out) -> fuse (in), fuse (out) -> VIN+ on Buck/Boost

Battery Ground (black)

* makita-black -> VIN- on Buck/Boost

Then VOUT +/- go to the binding post red/black