How Photographs were made 160 years ago

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I find it truly amazing how things were invented.  Particularly, the science of photography.  Especially all of the chemicals and light sensitive materials used.  How was it discovered?  Who thought to use red light to work in?  It’s really quite interesting. Well, the website Tested recently had a show in San Francisco where they went … Continued

Gears

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Gear reduction is pretty basic mechanical engineering.  It’s used everywhere and in everything.  It’s a great way to give a person an introduction as how various machines work, and how to increase torque, or speed.  The above contraption, made by Oskar van Deventer, has an astonishing gear ratio of 11,373,076 to 1.  That means, the … Continued

An Actual Periodic Table

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I’ve seen many different periodic tables in my time.  I like the awesome one best, but one thing all those had in common was trying constrain something in a setting it was never meant for.  Sure, with some work you could get the character one making sense, and the awesome one too, but the internet … Continued

LEGO transmission

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Here’s a nice demonstration of how a transmission works, with LEGOs!!! It’s pretty basic, but it get’s the concept across, and for that I post it. {reddit}

Traffic Lights were complicated

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Then computers were invented.  Here’s a really neat little video explaining how the old style traffic lights work.  The ones that use regular light bulbs, and moving parts, and lots of other breakable items.  Right off the bat, I used to notice burned out traffic lights all the time, but I live in a town, … Continued