How Do Vending Machines Tell the Difference Between Fake Coins and Real Coins?

I have wondered for quite some time how vending machines tell the difference between actual coins or fake money and slugs. It’s actually pretty straight forward, but cool to see anyway. Definitely a cool insight into how these machines work (and also, for those wondering, the amazing Skittle vending machines you see in photo above […]

The Cycloid Drawing Machine: A Fascinating Spirograph Creator

Since childhood, most geeks have been attracted to the Spirograph. Simple enough in execution, but exquisite in detail, they are science, math, art, and geometric magic, all merged in one. Joe Freedman of Leaf may have taken that appreciation of the Spirograph even further with his remarkable Cycloid Drawing Machine. So what is a Cycloid […]