LED UV exposure box part 1, the box

UVbox12

Note: Don’t look directly into the UV LEDs. It harms your eyes.
This project is featured at electronics-lab.com. There is also a part two, with a timer, check it out here.
Introduction

I have been using the toner transfer method for about 9 years with great results. Occasionally I would need a board with finer traces and I would [...]

CoMBi Clock

binary clock 4

This project has appeared on: 

Hack A Day

Electronics lab blog

embedds

bricogeek

“There are 10 kinds of people in this world….” and you know the rest.
Can you tell the time?

Watch the intentionally bad focused video below to see in which category you fit…

The mysterious device you can see is my binary clock.  If you couldn’t tell the time that [...]

Linear LED power supplies

fig3 mare

Introduction:

As of recent years, the offer on power LEDs has broadened and this technology seems to have a bright future in our lives replacing the incandescent light bulb. I have decided to write this article about the ways to powering LEDs because many people have asked me what type of circuit they could use.