Energy Tube, teaching resource for an array of scientific concepts: open and closed circuits, conductors vs. Insulators, light waves, sound waves,currents, and energy, When a conductor touches both of the electrodes on tube, tube emits a sound and flashing red/green/blue LED lights
Analogue To Digital Convertor, Excellent System For Demonstrating The Basis Of Digital Communications. An Analogue Input In The Range 0 To 7V Is Converted To A Binary Digital Output In 1V Steps (I.E. 1V Is Represented By 001, 2V By 010, Etc.)