I decided to do this project because I wanted a small but vary bright flashlight, so that I could use to use up all the old smoke detector 9V batterys. I change them every New year so I have a good supply of half dead batterys. This is what I came up with 3 white LEDs a chunk of pc board and a top to a 9V battery and some hot glue and some solder.





12 Reasons we Suck as a Species – Epi-3732
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Every species hits rough patches. But we’ve gone way past that. Right now,
humans aren’t just flailing we’re actively sabotaging ourselves. We’re a
species...
14 hours ago