Each time I have make one of these I always think – this could be better. The first 2 versions which can be found here and here, worked out ok but I have discovered that batteries don’t like to be enclosed and that their fail rate goes up dramatically when they are. This is due to the fact the batteries need to breath and once encased in resin suffer a slow death. I can still charge up the original ones but the batteries only last for a couple hours.
So I was thinking the best way to fix this would be to remove the batteries altogether. I did toy with super caps but a quick search on the net show they wouldn't be suitable for the job. Caps release their energy quickly and this just won’t work on something like this.
I finally decided to go down the path of using a wireless charging module. These are really easy to use and work like a charm. I used one in version 2 to charge the batteries up.
The other really cool thing about this version is the LED light. It comes with a remote and has heaps of features which allows you to change the colour and display of the LED's.
The project itself is quite simple and the only real messing about is making the box that the cube sits on. But you could easily simplify this and just use a brought box of your choice.
You can also click "here" to watch the video
and here's how you make one...