New passthrough built with a project box from ebay sent from China. The box is 100mm x 32mm x 32mm. Built with mosfet, and aviation connector. The black wrap is a large shrink tube.

I decided to build this using an ancient AT PC power supply. It's still a bit large but much smaller than the first two.

This is my second attempt to build a power supply for my passthrough. This one is much smaller depth wise. I think it's better looking too.

This is my new power supply and cherry wood passthrough. The power supply uses an old AT power supply from a junk computer. It has a 5 volt barrel jack for the passthrough, USB ports for charging and a 110 volt outlet.