One of the first things you learn in electronics is how to identify a resistor’s value. Through-hole resistors have color codes, and that’s generally where beginners begin. But why are they marked ...

Recently [mit41301] wondered about increasing the data capacity of QR codes, and was able to successfully triple the number of bits using color. He chose the new rectangular micro QR code (rMQR) ...

If you manage a New York apartment building, you’ve got to know where that water is flowing—for putting out fires and for upgrades, maintenance and inspections. With pre-war buildings and ancient ...