This low-cost project uses an 8-pin microcontroller to allow a customisable alarm to be created. * The alarm responds to a number of user selectable inputs such as tilt–switches or light sensors, and activates a bicolour LED and piezo siren * Supplied as a set of 5 projects containing 5 PCBs and 5 kits of components Suitable tilt-switches are available separately - see Sensors section