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Here is a cool technique for creating a thermometer style chart in Excel.

Here is a cool technique for creating a thermometer style chart in Excel.

Saturn V [2000 x 5984].

Saturn V [2000 x 5984].

Today I found out how an LED works.  An LED or “Light Emitting Diode” is basically as the name describes; it is a special type of diode that is specifically optimized to give off light, usually in the visual or infrared spectrum, as electricity is passed through it. A diode is a special type of semiconductor that has many uses.  One of [...]

How LED's work - A light-emitting diode (LED) is a two-lead semiconductor light source. It is a pn-junction diode, which emits light when When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes wi