CHAPTER 1. INTRODUCTION 61.2 Additionally required componentsFor Crash Bobby, a standard model-making rechargeable battery of 7.2, 9.6 or 12 volts canbe used. However, the qfix rechargeable battery pack (order No. QAAC000) is especiallysuited to this use since it already contains the required adapter cable and Velcro strips forsimple mounting of the batteries.For charging the battery, a standard battery charger can be used or, alternatively, the qfixplug-in battery charger (order No. RBAD000) is available.1.3 Interesting extensionsThe following extensions to the Crash-Bobby kit bring even more fun into your roboticsadventure:• Line sensor set (No. QAAAB000) for moving along a line.• Bumper set (No. QAAB005) to react to contact with obstacles.• LC-display board (No. QAAF001) for displaying arbitrary information.For beginners in computer programming the graphical programming environment “Grape”(No. QAAH000) is an interesting tool.1.4 ReferenceThis manual refers to software version 1.2.