We're having a Halloween party around my place, which is mostly taking place outdoors. I thought it would be cool to have some glowing LED 'eyes' watching from the bushes and trees around the party, so I did some googling and came across LED Throwies
. They're kind of cool, but I wanted to have two LEDs running off one battery, and have them sufficiently far apart that they looked like glowing eyes from a distance of a few metres.
So, I came up with these 'Toilet Roll Terrors', or Bog Roll Bogles, if you're from my part of the world. Essentially, it's two LEDs forming a simple circuit centred on a 'coin slot' for the watch battery that powers the whole thing. It's all put together with tape, garden wire and a toilet roll.
Read on to see how they're put together.