Science Gizmo: ENERGY BALL

Science Gizmo: ENERGY BALL

This science gizmo Energy Ball now has upgraded electronics, and a pull tab to preserve battery life. It is a great way to demonstrate for kids how to conduct electricity in a circuit.
The energy ball contains 2 small metal electrodes that, when touched simultaneously, cause it to light up. Comes with a Teacher’s Guide. No other energy ball on the market with these upgraded features. (NOTE: Brand may vary from image displayed)

A resistance touch switch requires two electrodes to be in physical contact with something electrically conducting (such as a finger) in order to function. They function by decreasing the resistance between two metal pieces.
Thus, its construction is significantly easier than that of the capacitance switch. By placing one or two fingers across the plates, the switch can be turned on or off. When the finger(s) are removed from the metal pieces, the gadget is turned off.

The base of the first transistor would be connected to one of the electrodes in one version of a resistance touch switch involving two Darlington-paired transistors.
Also usable is an N-Channel, enhancement-mode, metal oxide field effect transistor. Its gate can be connected to one of the electrodes and the other electrode through a positive voltage and a resistance, respectively.

Science Gizmos are fun way to demonstrate and show the properties, mechanics and applications used and taught in Physics and Chemistry laboratories.
By using simple easy-to-use apparatus specific to the target theme or topic, understand the scientific reasons why a particular thing works the way it does and enjoy the excitement of discovering how it works.
(NOTE: Brand may vary from image displayed). Check out other Gizmos available!

(Wikipedia excerpt: ..."...A gizmo is a gadget, especially one whose real name is unknown or forgotten.... A gadget is a mechanical device or any ingenious article.[2] Gadgets are sometimes referred to as gizmos. ...The etymology of the word is disputed. The word first appears as reference to an 18th-century tool in glassmaking that was developed as a spring pontil.[3] As stated in the glass dictionary published by the Corning Museum of Glass, a gadget is a metal rod with a spring clip that grips the foot of a vessel and so avoids the use of a pontil".

Gadgets were first used in the late 18th century.[4] According to the Oxford English Dictionary, there is anecdotal evidence for the use of "gadget" as a placeholder name for a technical item whose precise name one can't remember since the 1850s; with Robert Brown's 1886 book Spunyarn and Spindrift, A sailor boy's log of a voyage out and home in a China tea-clipper containing the earliest known usage in print.[5]...")

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