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A cheap source of LEDs A full torch / flashlight
I found a pack of six gas-lighters with built-in LED lights for a pound. Dismantling these was fairly easy, as shown in the pictures, it's not too dissimilar ...
Wire all of the LEDs together. I've pushed the +ve electrodes through a small piece of insulation, cut from some heavy mains cable, like an elastic band this ...
I'm encasing the unit in resin, using a handy mould I found. Holes were drilled for the electrical connections, and I tried to seal up with Blu-tack (worked ...
Roll a tube from paper around some AA cells. I've coated this with resin, but tape would be just fine. For the other battery contact I've got some ...
Cut two slots in the end of the tube to retain the battery with a clip. Form the clip from e.g. a paper-clip, or other piece of stiff-ish ...
Gaffer tape removed. Most of the insulation was removed from the wire and the strands re-wrapped. A bit more resin was added to the rear-end, with the clip-slots ...
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