Power-an-led

How To : Build a Leyden jar and use a capacitor

Simple yet effective, capacitors come in a dizzying array of forms and materials, vital to so many circuits for storage, timing, and filtration - the mighty capacitor! In this installment of the MAKE presents series, Collin Cunningham explains - how to build a Leyden jar, how ...more

How To : Make a lithium thionyl chloride battery

Watch this science video tutorial from Nurd Rage on how to make a lithium thionyl chloride battery, which is capable of generating 2.8v with enough current to power a LED. Warning: Thionyl Chloride is EXTREMELY toxic and this experiment must be performed in a fumehood by an e ...more

How To : Make a Programmable Piano in Minecraft

There are many impressive accomplishments in Minecraft, too many to name in fact. Sprawling builds, complex machines, and massive servers are the hallmark of Minecraft and things keep getting bigger and better. No one doubts the epic scale Minecraft has reached, but every once ...more

News : Create perpetual energy - almost

Is perpetual energy possible? The debate rages on. And they just keep trying. This particular device may not be perpetual, but it is far more efficient than, say a homopolar motor. The magnet in this device, the creation of our friend HowieD, propels the rotation, powering ...more

Graphene : Another Amazing Carbon Product?

What Is Graphene? Graphene is a very thin layer of graphite. Graphite is made out of carbon (the mother of all elements), and is normally used in pencils. Graphite is also used for brake padding in larger vehicles, the batteries in laptops or portable gaming systems, and in t ...more

How To : Install a computer graphics card

You don’t have to be satisfied with the graphics that are on your computer. There are great graphics out there and with a little time and a screwdriver you can install killer graphics on your very own computer. Step 1: Uninstall old software Uninstall the old graphics card’s ...more

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