With some simple hardware, ditto Windows program and a PC, it is possible to determine which of up to 20 switches is pressed first. Even the exact order can be displayed on a PC monitor. Ideal for quizzes and other games!The most remarkable feature of this QuizMaster is its simplicity. In its entirety, it consists of no more than a trivial interface, a number of pushbuttons and a Windows program. The interface comprises, all in all, seven components and is connected to the COMport of a PC. The pushbuttons for the quiz contestants (a maximum of 20) are fitted with a ‘1-wire multidrop’-device and are all connected in parallel to the interface. The program, written in ‘C++ Builder’ from Borland, controls the entire system and displays on the PC screen the order in which the pushbuttons were pressed.