Wednesday, 3 March 2010

Positives and negatives

I've spent most of my time since the last post testing out batteries. Big ones, little ones, watch batteries and torch batteries; attempting to figure out circuits and safety systems, and how voltage and ampage works. I still can't get my head around creating "strings" of cranes, but I've discovered something: batteries last longer than you'd think.

I've been using rudimentary circuitry - I've taped the sticks of the LED (still not found out what the correct term for those are) to the batteries. The plus side of this is that it is easy, you can put a tab in (so you can make them up prior to needing them and only activate them when you pull the tab), and there's little danger of electrocuting myself, anyone else, or setting fire to the whole shebang.

I started a test using AG12 batteries (which are coin batteries, but still relatively small) on Monday, and as of Wednesday night, it is still going strong enough to light up the inside of my crane - in fact it is still as bright as it was when I first connected the batteries up:

The batteries are only 1.5v (roughly), whereas the LEDs are around 3v, so I need two batteries to each LED. Which means 2000 batteries in all. 2000 batteries. And who knew that batteries are so expensive?

I'm looking at two options now: figure out another way to do it, or figure out a way to get cheap batteries. Anyone reading this from Duracell?


  1. My husband, who knows all about these things, says the sticky-outy bits are called 'leads' :)

  2. ooh thank you. my dad said "contacts", so I'll alternate between those from now on!

  3. Well my husband says their call bushels.. So i will alternater between te three