There is proposed a circuit arrangement for the actuation of a VFD, LED or LCD display, which has at least two control blocks for producing control signals for the various kinds of display, wherein the control signals of the control blocks are processed by a common driver component and the driver component transmits suitable actuation signals to the terminals of the VFD, LED or LCD display. The method may include coupling a plurality of memory arrays to a conductor, where the arrays may include memory elements. For example, the pin assembly can include a slot formed on an exterior surface thereof, and the timing belt pulley can include a key extending towards the pin assembly and configured for engaging the slot.