This is a remix of https://www.thingiverse.com/thing:2120173 however it is actually a complete ground-up redesign from scratch in Fusion 360 using the source "thing" as a reference for sizes.

This version is improved with the ability to run the PSU from 3x 18650 batteries, or a hobby battery from something like a model RC helicopter.

1x DP30V5A - https://www.ebay.co.uk/itm/272718281609

1x 4mm Bannana Jack Set - https://www.ebay.co.uk/itm/264469858505

1x 16mm 12v Latching Button & Connector - https://www.ebay.co.uk/itm/1352395057455

1x XL6009 Step Up converter - https://www.ebay.co.uk/itm/262598327314

4x M3x20mm Grub Screws - https://www.ebay.co.uk/itm/174008149758

1x 5.5x2.5mm DC Female Jack - https://www.ebay.co.uk/itm/401763112690

1x 3S LiPo Protection PCB - https://www.ebay.co.uk/itm/192756798512

1x 3S LiPo Battery Meter - https://www.ebay.co.uk/itm/113890682728

You'll also need basic soldering supplies, such as some wire, solder, soldering iron, electrical tape, heatshink etc.

Im not going to provide a wiring diagram, if you're messing with LiPo's, you should be able to finish this one yourself.

One thing to note, there is a potentiometer on the Boost Converter PCB, set this to output something close to 35v so your DP30V5A can output that voltage.