Variable Voltage Mobile LED Power Supply

[Jim Donovan]

I have been working on my AP for Structures in the NMRA modeling program so I have to have the buildings judged. I light all of my buildings and in the past took a power pack with all the wiring, kinda of a mess. So I decided to create my own portable power pack. It consists of a buck converter, two wire snap connecter and a nine voit battery (with connector).  Measuring the various parts I used Tinkercad to design a box to hold all the parts in place and here is what I came up with.

[deemery]

So that buck converter includes an LED to show output voltage?  Snazzy!

(When I did the box for my Arduino powered signal and crossing controller, I glued Wago Connectors to the box for the external connections.)

dave

[Jim Donovan]

The buck converter on costs $1.85 each from Tuni, the battery connector less then .25 and the snap connector a dime. The 3D printed resin came in at $.50 so it worked out great.

These buck convertors come with control buttons to show input and output voltage showing result on the screen, a lot of stuff in a small package.

Jim

[jbvb]

That's a nice tool.  Not sure I'd build one of my own; I bought a smaller-than-a-shoebox lab DC power supply with more features several years ago.