Electroscope

The electroscope pictured in Fig. 1 can be used to display static energy charges from sources such as TV sets, electrostatic generators, car...

Static Electricity Detector

The static-electricity detector shown in Fig. 1 is a simple tester designed to detect nearby static-electricity fields. You can easily demon...

Touch switch

A touch switch is a useful circuit that can be used to detect humans or protect small objects, such as antiques. It can be used to turn on a...