This handbook offers some simple circuits that will monitor weather and environmental conditions and provide warnings or take remedial action as necessary. for example, such projects include rain detection, frost warning, under/over temperature monitoring, dusk/dawn switching and automatic plant watering. Raking through the chapters, the reader will find such interest as security devices,process timing, earning cables for propagators, ponds and pumps, and the low-voltage circuits for lighting schemes. To encourage beginners branching out in electronics, some construction methods are introduced using breadboard layouts, or screw terminal blocks to obviate soldering. In the interest of safety, all projects are powered by low voltage supplies.