23 October 2012

100000 Viewers!!!

Wow! According to Youtube's statistics, the video about my charlieplexed LED cube was watched over 100,000 times. Unbelievable! Unreal! Unforeseen!

Thanks for all your interest and all the positve feedback. I don't know if I will be able to top that, but I will keep trying,

20 October 2012

The Charlie Cube Mark II: 4x4x4 - Update

Build this simpler version instead!

When I wrote my post on my charlieplexed LED cube, I never meant to publish build instructions. There are plenty of instructions around and a regular LED cube is much easier to make.

Instead, I wanted to show that it is possible to use charlieplexing for such a cube. And I wanted to share my thoughts on how I got there. So I never published schematics for the cube. Also, it is relatively difficult to draw a 3D electronic structure on a 2D schematic.

But quite a lot of people asked for a schematic. So in the end I just tried my best to draw it in an understandable way. I still think that for someone with some basic knowledge of electronics it is better to try to follow my explanations in the original post. But anyway, here it is.

16 October 2012

A Charlieplexed Knight Rider Light

  • Low cost and low part count
  • Four different flashing patterns, easily modifyable
  • Speed control and pattern switching via pot


This is nothing special, really. "Knight Rider lights" or "Larson Scanners" seem to be very popular microcontroller projects. I guess they are the next step right after the blinking LED (a.k.a. the "Hello World" program for microcontrollers).

I was recently asked if I could draw a schematic for such a device and in the end I decided to actually build the circuit. That way I could turn it into a blog post and make it available to a wider audience. The other point was that I could get my kids involved in building this.

This version is not exactly a beginner's project, because the charlieplexing is quite complex and turning the schematic into wiring can be a little confusing. So perhaps it is a good project to improve your soldering skills.