Simple Circuit Modules. These modules may be used to construct simple circuits of the type normally implemented on, for example, a Worcester Circuit Board. They are intended to introduce younger pupils (ages 11-13) to some of the more familiar applications of devices and circuits, the main emphasis being on simple electrical circuit work. The module is 80 x 60mm and has 4mm plug connections. This module is a reed relay. A current through the coil produces magnetism to cause the reed to switch another circuit; the reed contacts are protected from short circuit damage by a low-value series resistor.
