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.
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step 1You Will Need
To build a Toilet Roll Terror, you will need:- One standard toilet roll inner tube- a roll of black electrician's insulating tape- One Lithium CR 2032 watch battery- Two co…
step 2Prep the tube
First of all, take your tube and cut a half-inch slit across the body of the tube with your craft knife. Do this very slowly and carefully so you don't go through the roll…
step 3Insert and bend the LEDs
Next, slide the two LEDs into each of the LED slots. Make sure that the longer leg of the LED is on the same side as you look through the tube. In my pictures, the longer…
step 4Create first contact
Next, we're going to create the first part of the simple circuit. What you are doing here is turning one side of the battery slot into a contact that connects to one leg o…
step 5Connect the LEDs by folding the wire
Pull the wire tight and bend it around the end of the toilet roll, making sure that it touches the leg of the LED. Pinch the wire flat make sure it is tight in to the toi…
step 6Repeat steps 4 and 5
Simply repeat the same steps as above, but for the other side of the battery slot. It doesn't matter if the two wires in the slot are touching - the battery will separate …
step 7Insert battery, test and tweak
Grab your battery and carefully push it into the slot in the centre of the tube, using your finger behind it to control it and bend the wires back into place if they shift.…
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http://www.instructables.com/id/Simple-Halloween-Watching-Eyes-with-LEDs/