How to Harness Solar Energy to Make Your Own Post-Apocalyptic Keys

We all acknowledge the humanity ’s going to end at some point , and sure , peradventure it ’s not entirely “ likely ” to come about anytime soon — but better safe than sorry . So assuming you ’ve already been operate diligently on your underground , radiation - proof dugout , what ’s work to happen when you need surplus keys made with nary a ( non - zombie ) locksmith in sight ? fortuitously , asHack A Dayshows us , there ’s an easy , precise enough direction to make your very own spare Key with nothing more than some plaster , the sunlight , and a jumbo fresnel lens .

The first part is easy enough ; only put a thick stratum of poultice of paris in a small box , place the fundamental halfway into the surface , fill the rest of the way of life with plaster , and allow dry for a few 60 minutes . Then , place a bowl of zinc pellet ( which you could buy on the internet ) beneath a fresnel lens to give you liquefied metallic element . The fresnel lense can capture the sun ’s devious rays , making it more efficient as a concentrated energy beginning . Once the pellet have melted , you ’re then free to ( carefully ) pour into your key moulding . appropriate the atomic number 30 to chill and bam — you have yourself one sweet , slightly less sturdy , yet still functional keystone .

Of course , all this is pendent on the fair bluff Assumption of Mary that you ’ll have a monolithic fresnel lens lying around should the need arise — so better add that to your End Timesshopping list . And stay vigilant , friends . [ cut up A daytime ]