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Oscillators are a type of circuit found in many types of electronic equipment, including clocks, radios and computers.
A pair of parallel wires serves to illustrate a principle that French Scienist André-Marie Ampère was the first to comprehend, back in 1820.
No fancy movement in this tutorial, but these rules come in very handy when trying to understand some of what’s going on in our other tutorials.
Transformers are devices that transfer a voltage from one circuit to another circuit via induction.
Electricity goes through some ups and downs on its way from the power plant to your house. Here's how it works.
Invented decades before it could be used, the first type of electric light was so brilliant it was used for lighthouses and street lamps.
In 1906, American physicist Lee De Forest invented the Audion (or triode), building on the discovery of the diode just a few years before.
English mathematician Peter Barlow devised an instrument in 1822 that built on advances from earlier in the century (including the invention the battery) to create a very early kind of electric motor.
This nifty device, a kind of precursor to the Slinky, demonstrates how parallel wires attract.
English chemist John Frederick Daniell came up with a twist on the simple voltaic cell that resulted in a longer-lasting source of power.