USB clip light

This is a clip that integrates a 9V battery and a USB buck converter for use with a USB light. I designed this to be used on a clipboard or as self-standing on a desk. It's too bulky to be used on a book.

The battery housing is polarity-dependent and only accepts the 9V battery in the correct orientation.

I kind of half-improvised the design of this so it's made to fit the components I already had at home... this unfortunately means you might not be able to build it if you don't have the same components that I do. While the USB board is easy enough to find, and a suitable switch can probably fit with some hot glue, making the battery contacts requires a bit of improvisation as there is no suitable off-the-shelf component that I know of.

In order for this to work, you will need:

* [This USB buck converter](https://www.ebay.co.uk/itm/6-24V-12V-24V-to-5V-3A-CAR-USB-Charger-Module-DC-Buck-step-down-Converter-L/192031856043?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc