LED UV exposure box part 2, the timer

timer mounted

Introduction

Continuing the development of my UV exposure box I have designed and built a countdown timer.

There are a few others out there for the same purpose, but I wanted to add some more features to make things better.

As I have mentioned in the previous post, safety was a big concern for me [...]

USB tree

USB_tree2

I kept losing my USB memories, modems, programmers and such. The solution?  Here comes the USB tree, ready to keep all your USB things in one place, on your desk.

The build is rather simple, one wooden base, some copper wire, USB connectors and a lot of soldering. Do note that a regular 50 [...]